I messed up my iTunes folder! How do I transfer it to another hard drive?

Question

Hi, my "C" hard drive is almost full, so I decided I would transfer my "My Music" folder to another internal hard drive I have installed in my computer (the "G" drive). This folder takes up 4.59 GB of space. I use Windows XP Home, SP3, along with iTunes 9.0.2.25 with an old iPod Nano 4 GB.
So I made sure iTunes was closed and I copied the folder. Before I copied it, I checked, and inside the iTunes folder was:
1) iTunes Music folder (inside has all the artists I have listed alphabetically)
2) Previous iTunes Libraries folder
3) iTunes Library Extras.itdb
4) iTunes Library Genius.itdb
5) iTunes Library.itl
6) iTunes Music Library.xml
7) sentinel
Now I could be wrong about the above, but I know the iTunes Music folder was definitely there (since I checked it to find out where my songs were stored).
So after I copied the folder, I opened iTunes and tried to change the directory so iTunes could find my songs, via "Preferences" > "Advanced" tab (in doing this, I noticed the old choice was in the C drive pointing to an "iTunes Media" folder.) So I selected "browse" and pointed it to the "iTunes Music" folder in the G drive and then hit "change", but iTunes did not find my music, even though it was right there! I closed iTunes and re-opened it, but it still could not find the music!
So then I went back to the C drive and went into the old "My Music" folder, which I did not want to delete until I was sure I had made the transfer ok. Much to my surprise, I found new files which magically appeared there after I opened iTunes!
I found these:
1) iTunes Media folder
with these subfolders:
1) Movies folder (I don't have any movies for iTunes)
2) Automatically Add to iTunes folder
3) .iTunes Preferences.plist
and maybe an empty iTunes "Music" folder.
This left my confused. So I tried to rearrange everything back in the C drive like it originally was, and hit "reset" under iTunes "Preferences" > "Advanced" and the music seems to be playing ok now...but I am not sure what damage has been done.
Here are my questions:
1) Why did an "iTunes Media" folder magically appear in the old C drive after I opened iTunes?
2) What belongs where now? What hierarchy of iTunes folders and files should I use in my new G drive?
3) How do I get iTunes to recognize where my music has been transferred to?
Thanks so much!
Stephanie

Answer 1

Oh, and I finally did fix everything!
Basically, when I did that "Consolidate" function, iTunes made doubles of all my songs in the Media folder, and also in my music library list on the top left of my iTunes control panel!!!
And the problem wasI was not looking at my music library list in the top left when I was syncing my iPod or trying to find the new paths for those 40 broken files; but rather, I was looking at the "Purchase" playlist, or whatever that is called, which records all my purchases! I never knew I had another master list called "music library" (yop left)!! I thought "Purchases" was my master list of songs. Duh!
So I started dragging songs from "Purchase" to the "Recycle" bin (so I could re-drag them back to iTunes--found this method on a google search), like someone advised, to fix my iPod sync problem. But I noticed when I was doing that, they were not appearing in my recycle bin, but just disappearing like they would do when you delete a song from one of your custom playlists, like "On-the-Go" or whatever. So that made me think there is another master list somewhere else (not "purchases"), and I found it on the top left of iTunes, the music library! There I found out that every song, except the one I didn't buy from Apple, was duplicated, and the second of each pair could not be found (had a gray exclamation point next to it)! So I deleted all those duplicates...took forever! And then when I synced my iPod, everything was perfect!
And, to my surprise, even though iTunes said it could not sync those 100 songs I referenced a few posts ago (Posted: Dec 12, 2009 9:03 PM) due to broken links, that was actually a lie!!!! After the iPod restore and new failed sync, I listed to my iPod, and found those missing 100 songs!!! I cannot believe iTunes lied to me!!!
Also, why isn't there a command listed to check all songs (this is a rhetorical question)! I have 900, and it would have taken forever to manually check them. I found out you have to hold "control" (via a google search) but this is not listed as an option under any of the iTunes menus!
Finally, that article you gave me was excellent! the one thing that would make it better is they should tell you what exactly to name your new folder or folders when you move them to a new hard drive, for dummies like me (do you call them "My Music" or "iTunes Media" or "Music" or "itunes Music", etc., especially when your old folder was stilled called "iTunes Music" and not "iTunes Media". This caused some problems yesterday for me, but overall I was ok!