Hi,
Instead of deleting and importing your music in Itunes, try selecting all songs, right click, get info.
Then do not change anything and just click ok. This will make Itunes update its library from your file tags.
When you rate a song on your iPhone, and getting that back in MC is a bit more difficult:
- in Itunes, sort your songs by rating
- select all songs with 1 start rating, right click, get info, in comments field: fill 1 for 1 star rating, click ok. Do the same for your other ratings. You can also make this step easier by making smartlist for each rating.
- in MC, update your library (run auto import)
- in MC, select all songs, right click, library tools, move/copy fiels, source=comment;destination=rating
Now your MC songs should have the similar ratings as in Itunes.
Before you try, make a backup of your library in case anything goes wrong.
Cheers