I hope that this is the right place to ask this, I would like to add a USB 2.0 and fire wire 800 cards to my g4 dp 1.25, do I need to remove the old fire wire 400 card or will they all fit and work together? every thing else is as it came from the factory, 120 gig hard drive, this is used every day at my Studio and I cant afford to make a stupid mistake, I am planning on adding a newexternal firewire 800 hard drive & possibly an external dvd burner, I was planning on doing the installation myself, I have added a video card to a pc and switched cd burners, but never been in my mac except when I added the new ram, let me know if I should take it to a repair station to have it done, our local mac dealer is not real good so i would have to take it about 45 miles, also I will be adding Panther to the mix soon should I wait till its installed the add hard ware or vice versa, I do plan to only add one card at a time, thanks sorry to be so long winded