Hi everyone. I have what I guess is called a G4 iMac (the kind with the telescoping monitor and half circle base) and I've been having trouble running videos from iTunes without them stuttering. I have upgraded the RAM to the maximum, which is 768 MB's, but I notice that the video RAM on the installed graphics card is only a paltry 32 MB's. Is there any way to upgrade this card? I've tried looking around the web, but everything seems to be for the G5 level iMac these days. Any advice would be most appreciated. Thanks for taking the time to read this and hopefully responding. Cheers.