How can I move my iTunes library to a new location?

Question

At the moment, my iTunes library is split across two hard drives, (22gb roughly on each). This was mainly so that if one drive failed, I didn't lose all my music. Anyway, I now have two 1tb drives and I want to move the entire library into a centralised location on one drive. I tried following the steps in this link: http://support.apple.com/kb/ht1364 but it was utterly useless (I have iTunes 10.4).
Right now, I have all my albums grouped into a folder called 'Albums' and for singles or albums where I only kept a few tracks I have the tracks organized into seperate folders according to genre. I want to keep this folder structure but have it in a centralised location instead of split across two disks. How can I do this?

Answer 1

Use Migration Assstant to move all content from an old computer to a new.
For iTunes alone:
iTunes: How to move [or copy] your music [library] to a new computer [or another drive] - http://support.apple.com/kb/HT4527 - a somewhat bewildering and not always easily understandable set of options.
Quick answer if you use iTunes' default preferences settings:  Copy the entire iTunes folder (and in doing so all its subfolders and files) intact to the other drive.  Open iTunes and immediately hold down the Option (alt) key (shift on Windows), then guide it to the iTunes Library.itl file in the moved iTunes folder.
For the record there's this reference for iTunes 11 but it really doesn't strike me as having the specifics you need. iTunes 11 for Mac: Move your library to another computer - http://support.apple.com/kb/PH12168 
Windows users see tip at: https://discussions.apple.com/message/18879381
If you put it in the default location of Macintosh HD > Users > *User Name* > Music  then you don't even need to start with the option key held down, iTunes will automatically look for it there.  (Make sure there isn't anything already in the iTunes folder there that you want to keep since you will be replacing it with the one you are moving.)