URGENT HELP REQUIRED!!!!!!!!!!

Hi everyone i have never posted on a forum before so im not sure if i will get an answer but hopefully someone here is smart enough to advise me, i am trying to connect two lans together, in each office there are 5 computers networked so as we can share files each office has an adsl line connected to all computers, both offices are in the same city only 2 miles between them, i need to connect both together, all the computers are running legal versions of xp pro sp2, can i bridge the lans and make life easy. Please Help. Regards Gary Jacobs
If you want to email me my addy is garyjacobs03@hotmail.com