Tiger to Leopard Upgrade on PPC

Anyone upgraded OSX from Tiger (v 10.4.11) to Leopard (v. 10.5.8) on PowerPC G5 hardware?

I need to upgrade my iMac to Leopard so I can install the current version of Eclipse and the Android development plug-in for Eclipse. I can't find a way to get this working on Tiger, so I need up upgrade to Leopard.

The Android SDK is not supported on PPC, but the Android Eclipse plug-in should work, I hope!