I run an iMac G4 with OS X 2.8

I recently let my daughter set herself up as a seperate user on the machine and he has her own log on. She has a wonderfully personalised profile but because she could not access the iTunes library from her log on profile she copied the entire library across from mine to hers and as a result doubled everything up and losing me 15 Gigagbytes or more of hard disk space. Is there a way that users under separate login profiles can share the same resources, partcicularly in applications like iTunes, iPhoto and iMovie?