my power book G4 is asking me to download flash player and i try to and it says not enought memory can someone help. how can i get more memory.

One source for your PowerBook G4 memory is OWC / MacSales: http://eshop.macsales.com/shop/memory/iBooks-PowerBooks/G4-Aluminum/

It is not likely to help with Adobe Flash Player though. Adobe has not updated their product for the G4 in many years, and nearly all recent Flash video content will require a newer version.

The most recent Flash Player version for your PowerBook is version 10.1.102.64. Download it from this page: http://helpx.adobe.com/flash-player/kb/archived-flash-player-versions.html

The installer is probably telling you your hard drive lacks enough space. How full is your hard drive?