I have a Sony Vaio PCV-RX550 and the PCI in the front part of the tower conaitns both the Firewire and the USB. I would also like to know if I only change the PCI card in the front of my computer, will it still work at the USB 2.0 level.
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Regardless, if you replace the current set up with one of 2.0 that matches it should fit with the current cover.
I just can not find a PCI card that is the same port setup as my current card and was also wondering if I could take off the cover and use a new card? I really don't know much about this whole thing!