you could try another method i suppose. i just install backtrack like any other operating system rather than mess with usb sticks. almost all linux distributions will have aircrack and whatnot in their repos so you could probably just go down that route.. slitaz, crunchbang, slax, and sidux are fairly small distros with decent live functionality.
in fact, i think the custom slitaz livecd that aircrack provide on their site will work out of the box with your card. i get the impression since you've yet to master google that you may have problems with a lot of linux distributions and tutorials though