Thanks to you both for your replies.
I will have a look out for a low profile wireless card. Although I still have an issue with the USB ports. Two of the 4 original ones are malfunctioning, that is the reason I was looking for a low profile PCI 2.0 USB 2 port. Belkin do one, but there's a two week delivery. Only problem with that is that I am impatient and trying to find a local supplier. Maplins (Portsmouth) have said that they haven't got any and they would have to order one in, so still 2 weeks delivery. I'll see if they do a low profile wireless card as an option.