Architecture problems on a Mac

I'm currently attempting to run ARToolkit on an old PowerMac G4. However, one of the packages is in an architecture not supported by the PowerPC Environment. Apparently, I need something that runs the Intel Architecture. The program in question is simpleVRML.

Is there a way for me to work around this architecture issue, to migrate this package to the PPC architecture, or to make this program run on this machine at all? Please send me your thoughts and possible solutions as quickly as possible.