It'll likely work, but who knows for how long. Flash drives really aren't that expensive to begin with, you might as well get a name brand one.
A 2GB Flash Drive will run you about $8 at Newegg.com or TigerDirect.com http://www.newegg.com/Store/SubCateg...ve&Order=PRICE http://www.tigerdirect.com/applicati...:24.99|&Sort=4
If you want advice on the size, what do you want to use the flash drive for? If you're planning on using it as a installation module (System ISO) then you'll want atleast 8GB. If you're planning on using it as a Readyboost module (Flash RAM) then you'll want 1-1.5 x your current amount of RAM.