no problem just though you were a "how do i crack my neighbors wifi guy " lol
ok you can use a couple of different methods
1 ) use cowpatty or airolib and batch and create a password database based on a ssid { slow }
2 ) use cuda and benefit from using your cpu and gpu for calculations
you can do a drive by method with cuda

i.e pass through method so instead of having to batch
a password list again'st an ssid you can pass the passwords through one at a time against
an ssid and depending on your nvidia card and amount of cuda cores it supports you could
be passing 20,000 pps {password per second } the better the card the higher the calculations
i.e tesla cards two of them bad boys and you will be eating passwords
both cow-patty and cuda support using a method of piping a password list through it but using cuda is
much faster
if you have any other questions on this Ill be happy to help you
BOTH methods can do brute force but as you will learn you have better odds at cracking
with a collection of wordlists than bruteforce as starting at
password
password1
password2
{ and when I say odds I mean Time wise }
etc etc it could take quite a while and you maybe lucky with the wordlist

example if you were to create
a wpa brute force word list i.e all possible combinations lol you would need a large server hardrive and a super computer
here is a wpa word list
newbielink:http://www.google.ie/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CEwQFjAA&url=http%3A%2F%2Fthepiratebay.se%2Ftorrent%2F5945498%2F&ei=We4VUIreIo25hAeV5oGgCg&usg=AFQjCNEvk-vcek6ntoQJ-s5T4T7OtNM7SA
[nonactive]you can break it down to 2GB lists for air-crack and cuda there is a way around
the cuda method to support higher file size but you can also just keep piping it