Yes your not gonna be able to crack WEP but don't get me wrong its possible but since your new it's damn near impossible for you.
Second yes, you can install it on a partition when running the installer click manual and of you go with some more research if you can't figure out the rest.
If you want to crack WEP go buy the TP-Link tl-wn821n wireless usb dongle and follow these instructions I know this one works, because I bought one yesterday and if you can't find that one, here is the list of some wireless usb dongles and the instructions.
This the best advice your gonna get on the WEP cracking thing trust me now here's the list
P.S READ the WHOLE thing and NOT just the BOXES.