I recently upgraded my iMac G5 (iSight) to 2.5gb ram and added a WD Mybook 500gb firewire HDD. The idea was to use the external to record my eyetv programs onto - which would reduce the Macs HDD usage, so, if eyetv is recording in the background, I can get on with other things more efficiently. However, I notice that while recording (to the external firewire), if I play a song through iTunes (on the mac HDD), it skips. When i am not recording, it stops skipping. Am I execting too much from my iMac? Or is something wrong?