Restoring iTunes/iPhoto Libraries After a Clean Install
Very simple, just copy the old 'music' folder from your user folder to the clean install user>music folder and relaunch iTunes. 

I have tested this on a mac, coz i manage my iTunes Library on my Windows machine (MBP has just 500GB HD and my library is almost 100GB :-)  ) . Please try this and let me know if it works. 

No need to dig any Application Support folder AFAIK. 

Hope this helps