Adventures in cross-platform living: where's my music at?!

I have now been living in XP full time for a couple of weeks, after 12 years as a Mac die-hard, and I have to say that the toughest nut to crack was getting my iTunes library migrated. (I say XP "full time," but what that means is that the machine under my desk with my email on it is an XP box. I'm typing this on an iBook, there's a "sunflower" iMac down the hall, and a dual-proc G4 in my studio. So I haven't really turned in my robes. But back to this iTunes thing.)

I wanted to completely relocate all my iTunes music to the PC because of studio relocation. The G4 will be sans Internet for the foreseeable future. So, I just copied my iTunes Music directory over the network. Installed iTunes on the PC and told it to go get all my music. It found about 3.7GB out of 20GB. Turns out, a bunch of my AAC files were associated with [shudder] Windows Media Player! So, I went and re-associated the file type. Then, I started manually adding those files to my library when it hit me. The iTunes library is determined by a file called, natch, "iTunes Library." So I connected via Samba to the G4 and grabbed that file, copied it into my iTunes folder (in My Documents, not in Program Files) and, like cheese on wheat, there sat all my songs. Except that a bunch of them with long file names (thanks, FAT32!) had a bang (!) out beside them, indicating that the app couldn't find them. Those had to be re-added manually.