Nope because intel and PowerPC (which is what G4 is) are two completely different architectures, so they can not run programs interchangeably.
No tricks. Just simply time for a new machine. If you need something inexpensive, look at the new mini, it's a great little box and will blow your G4 away...I just got a base model new one and threw 4gb of ram into it and It's faster than the G5 single 1.8ghz PowerMac I just got rid of last week...that's for SURE.