Having trouble installing graphire3 to Mac

Hello!

I'm trying to install my very ancient wacom tablet (graphire3) to my mac.

Everytime I try and click install, a message box pops up that says "You can't open the application Install because PowerPC applications are no longer supported."

Any suggestions? I've already installed the most recent updated version of drivers (5.2.6-3 or something of the like) and it hasn't done anything. Please keep in mind that I'm the farthest thing from computer savvy.

Suggestions?

Thanks!
-Steph

PowerPC code will no longer run in Lion and future versions of OS X. Snow Leopard was the last version of OS X that came with Rosetta which is needed to run PPC code on an Intel machine.