We are actually using a GUI file per test, but you can also set these up to live on the server.
If you create a repository folder on the server, and store your maps and data files there, you can call them just as you would from a local location; just call to the local drive of the server. If you want each file to be stored in the same folder as the test, you can get the test folder name by looking at the "Test Grid" in the Test Planning area - TD creates a Test_1 type file name for the folders, so you have to check here to get the correct information.
~ Annemarie Martin ~
~ So you found a girl who thinks really deep thoughts - what's so amazing about really deep thoughts? ~ Tori Amos