Sharepoint 3.0 migration

[Tracker]

hi I have been tasked by my manager to set up a testing environment of an existing sharepoint farm on our network. this has to be setup in our development domain I have tried to build it from scratch and trenspose the databases over using backups but they are not being exepted bacause theyes were biult on a different domain and the database passwords and usernames are not accepted.I think the problem is the diferent domains.

I am at a lose end and my bossis already shouting deadlines can anyone hel
p

thanks