diff --git a/media_editing/reference_playlists_to_library.py b/media_editing/reference_playlists_to_library.py
index 9382d77..9e62467 100755
--- a/media_editing/reference_playlists_to_library.py
+++ b/media_editing/reference_playlists_to_library.py
@@ -5,7 +5,8 @@ import re
 import logging
 import argparse
 from pathlib import Path
-from difflib import SequenceMatcher
+
+from serverlibrary import words, word_similarity, score_match_jaccard, score_match_fuzzy, combined_score
 
 WORKDIR = Path("/data/navidrome/music/")
 PLAYLIST_DIR = WORKDIR / "playlists"
@@ -28,44 +29,6 @@ class CustomLogger(logging.Logger):
 logging.setLoggerClass(CustomLogger)
 logger: CustomLogger = logging.getLogger(__name__)  # type: ignore[assignment]
 
-
-def words(text):
-    return set(filter(None, re.split(r"[^a-z0-9]+", text.lower())))
-
-
-def word_similarity(a: str, b: str) -> float:
-    return SequenceMatcher(None, a, b).ratio()
-
-
-def score_match_jaccard(search_words, candidate_words):
-    intersection = search_words & candidate_words
-    union = search_words | candidate_words
-
-    if not union:
-        return 0.0
-
-    return len(intersection) / len(union)
-
-
-def score_match_fuzzy(search_words, candidate_words):
-    total = 0.0
-
-    for sw in search_words:
-        best = 0.0
-
-        for cw in candidate_words:
-            best = max(best, word_similarity(sw, cw))
-
-        total += best
-
-    #    logger.trace(f"Total: {total}/{len(search_words)}")
-    return total / len(search_words)
-
-
-def combined_score(score_fuzzy: float, score_jaccard: float) -> float:
-    return score_fuzzy * weight_fuzzy + score_jaccard * weight_jaccard
-
-
 def find_folder(directory: Path, folder: str) -> list[Path]:
     matches: list[tuple[Path, float]] = []
     search_words = words(folder)
@@ -78,7 +41,7 @@ def find_folder(directory: Path, folder: str) -> list[Path]:
 
         score_fuzzy = score_match_fuzzy(search_words, candidate_words)
         score_jaccard = score_match_jaccard(search_words, candidate_words)
-        score = combined_score(score_fuzzy, score_jaccard)
+        score = combined_score(score_fuzzy, score_jaccard, weight_fuzzy, weight_jaccard)
         logger.trace(f"Candidate: {score:.2f}:{candidate_words}")
         if score > folder_score_threshold:
             matches.append((candidate, score))
@@ -216,7 +179,7 @@ def find_replacement(old_path: Path):
 
                 score_fuzzy = score_match_fuzzy(search_words, candidate_words)
                 score_jaccard = score_match_jaccard(search_words, candidate_words)
-                score = combined_score(score_fuzzy, score_jaccard)
+                score = combined_score(score_fuzzy, score_jaccard, weight_fuzzy, weight_jaccard)
                 logger.trace(
                     f"{filename_structure} Words: {candidate_words} {score:.2f} / {best_score:.2f}, "
                     f"{weight_fuzzy:.2} * {score_fuzzy:.2f} + {weight_jaccard:.2} * {score_jaccard:.2f} "
diff --git a/serverlibrary/__init__.py b/serverlibrary/__init__.py
index 99dc9a5..25d2a92 100755
--- a/serverlibrary/__init__.py
+++ b/serverlibrary/__init__.py
@@ -2,3 +2,8 @@ from .core import safe_rename
 from .core import safe_delete
 from .core import get_audio_tracks
 from .core import get_subtitle_tracks
+from .core import words
+from .core import word_similarity
+from .core import score_match_jaccard
+from .core import score_match_fuzzy
+from .core import combined_score
diff --git a/serverlibrary/core.py b/serverlibrary/core.py
index adb41dc..d16e599 100755
--- a/serverlibrary/core.py
+++ b/serverlibrary/core.py
@@ -5,6 +5,7 @@ import subprocess
 import json
 import re
 from typing import Any
+from difflib import SequenceMatcher
 
 
 # -----------------------------
@@ -16,7 +17,8 @@ def safe_delete(path: Path):
     else:
         path.unlink()
 
-def safe_rename(src: Path, dst: Path, dry: bool=False, confirm: bool=False, silent=False):
+def safe_rename(src: Path, dst: Path, dry: bool=False, confirm: bool=False,
+                silent=False,overwrite=False) -> (str, bool):
     """
        Safely rename a file or directory without overwriting existing files.
        Automatically appends _1, _2, ... if needed.
@@ -45,14 +47,18 @@ def safe_rename(src: Path, dst: Path, dry: bool=False, confirm: bool=False, sile
         print(ret)
 
     if dry:
-        return
+        return ret, True
 
     if confirm:
         input("Press Enter to confirm...")
 
     dst.parent.mkdir(parents=True, exist_ok=True)
+
+    if dst.exists() and not overwrite:
+        print("File already exists...")
+        return "",False
     src.rename(dst)
-    return ret
+    return ret, True
 
 def get_audio_tracks( source: str, title: int | None = None, handbrake: bool = False) -> list[dict]:
     """
@@ -197,4 +203,42 @@ def get_subtitle_tracks(source):
             "primary": False,
         })
 
-    return tracks
\ No newline at end of file
+    return tracks
+
+
+def words(text):
+    return set(filter(None, re.split(r"[^a-z0-9]+", text.lower())))
+
+
+def word_similarity(a: str, b: str) -> float:
+    return SequenceMatcher(None, a, b).ratio()
+
+
+def score_match_jaccard(search_words, candidate_words):
+    intersection = search_words & candidate_words
+    union = search_words | candidate_words
+
+    if not union:
+        return 0.0
+
+    return len(intersection) / len(union)
+
+
+def score_match_fuzzy(search_words, candidate_words):
+    total = 0.0
+
+    for sw in search_words:
+        best = 0.0
+
+        for cw in candidate_words:
+            best = max(best, word_similarity(sw, cw))
+
+        total += best
+
+    #    logger.trace(f"Total: {total}/{len(search_words)}")
+    return total / len(search_words)
+
+
+def combined_score(score_fuzzy: float, score_jaccard: float,
+                   weight_fuzzy: float, weight_jaccard: float) -> float:
+    return score_fuzzy * weight_fuzzy + score_jaccard * weight_jaccard
\ No newline at end of file