Recording with a PC Laptop..?

Need a easy solution…

Ok. So I need a quick fix…

I need to use my laptop to record some off-location vocals. The soundcard in the laptop is pretty crappy and has lots of latency. Anyone know of something that I can get at Guitar Center (it is the only thing I could get to quickly)? I only need one input.

I was looking at the Presonus Firebox maybe? The only thing is that my firewire port on the laptop is 4-pin. I know most units need 6-pin to be powered… so my 4-pin won’t power it… but will the 4-Pin still work efficiently with units like the FireBox?