It's an easy job to do, but you're going to have to take the lid off, unless it's a laptop.
For a PC, this card from
Aria looks good, and it's got Firewire on board as well.
From the description, it looks like there's an internal USB connector, which you might be able to wire into your PC's existing connectors. However, not all PC USB connector blocks are the same, so it might need a bit of tweaking. You could also consider buying a USB extension cable at the same time and running that from the back of the PC to the front, and then plug it into a USB2 hub.
To install the card, power the PC down, unplug the power cable and take the lid off.
Remove one of the blanking plates at the back where the cards slot in, keeping the screw to hand.
Touch the metalwork of the PC to balance out any static. Do this periodically as you work, and particularly if you've dragged your feet over the carpet. Static electricity doesn't always kill components outright these days, but they last a lot longer and work more reliably if you take care.
Open the packaging for the card and pick the card up by the metal shim on the edge - try not to touch the circuit board much.
Follow the cabling for the PC's internal usb connector and if you can, swap the cable from the PC to the card.
Gently line up the card in the slot and push it home firmly - if you have to force it, it's probably not lined up. Pay attention to the card sockets - some of them are different and you might need to rethink what slot you're going to use.
Once the card is located, put the screw in to hold it in place.
Lid on, power up and it should install the drivers and go.
If this all goes pear-shaped, don't blame me, and feel free to RTFM that comes with the card
If it's a laptop, get yourself a PCMCIA adapter, plug it in and Robert's yer father's brother.
