Q: trying to download adobe, don't remember last password?

Are you talking about your Adobe I.D.? If so, you can call Customer Service and ask to reset your password, or you can make a new I.D. and download from there. If you're eligible for the upgrade pricing and are using that, you will need your old serial number, but you won't need the old I.D.

By the way, the newest Creative Cloud and Creative Suite 6 won't run on a Power PC. I think the newest you can run is CS3 or 4, and you'll need a lot of RAM. You'll have to get those from eBay or Amazon or another reseller.

Adobe what??

Resetting or changing a password:

For Snow Leopard or earlier:  http://support.apple.com/kb/HT1274

For Lion or later:  http://support.apple.com/kb/HT6022