I have Latitude C540. Best I can tell I have a USB 1.1 port built in. First question, is this true or is it a 2.0 port? I went out and bought a pcmcia card that has two USB 2.0 ports on it just because I needed an additional port. But I now have a pcmcia wireless card and I can't put both of them in at the same time due to space constraints. So, second question, is there an extension card of some kind I can use so that both cards will fit?