how much money or how much ram ?

the tray loaders take pc-100 so-dimms and they cna take 2 256 mb ones maxing them out to 512 mb ignore apple's specification of 160 max they can take 512

however the trayloaders have a little quirk in that some of them wil see the whole 512 and others only 384 you wont know which one does what until you try even 384 works fine for X

go with jaguar it wil run just fine on that imac its supported to run on that imac and you dont need to perform any drive voodoo because the hd is just 4 gig