Below is a list of some useful downloads for the EZ family.
EZ-AG Manual (pdf)
EZ-EG Manual (pdf)
Marc's EZ-EG / AG Application (v.3.13)
TenCrazy.com Yamaha EZ-Guitar Environment v2.21(v.3.13) - the creator's site
If anyone wants me to take down a link to their program then just let me know. I've put links to your sites (where I can find them) in the link section as well.