I've got a 12" iBook G4, 1.33 GHz with 512 Mb RAM built in. I'm running Tiger 10.4.10. According to the sysstem profiler, there's an empty slot for a SODIMM, and I'd like to fill it with a 1 Gb chip, specifically this one: http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=ED5B5040A5CA7304 I'm hoping that this will give me a significant performace improvement in WoW without having to drop $2k+ on a new MBP. I'm tired of only getting 4 fps in Stormwind. I've never opened up my iBook before, and I'm a little nervous. If anyone could share their experiences and offer advice/guidelines, I would appreciate it.