Dangit, I got here too late...
In case you don't know how to connect to your Linksys router, go to address
192.168.1.1 via web browser at home, and the default login/pass should be
admin/
admin, which I suggest you change, otherwise and your WEP settings will be useless because your neighbour will be able to login and change things back...or worse...block YOU from your own connection.
I
HAVE gone into my neighbour's router before just to see what ports he has forwarded etc. but if I wanted to, I could do many nasty things
Fortunately, I have nice neighbours
Just a little off topic technodoll, but how come your wireless costs increase with higher download/upload? It's not unlimited?