Good chance
It is very likly that it will do exactly what you dedsire, the biggest performance boost i noticed on my 450 tower was in quartz extream. What type of graphics card do you have in your baby? if it's supported then yes, yes you will see a significant performance boost. Hope this helped, if you are hung up on the cost of 10.2 then try to find a friend that works in the eduction market and take advantige of thier discount 🙂
PowerBook G4 1ghz