Don't bother with WEP, it's pretty much useless if your neighbours are tech savy enough to moniter what your transfering.
FYI you can hunt it down but there was a thread on this forum I believe about how WEP can be cracked it around 3-5 minutes? I tried a tool(can't remember name) and it cracked my WEP encryption in 34minutes. ...
If you want to encypt the data stream from prying eyes add on WPA encyption.
If you just want to keep accidental neighbours off of your network, what you have done will be fine.