Use BeyondCompare as default Diff in Visual Studio with Team Foundation Server

http://www.scootersoftware.com/support.php?c=kb_vcs.php

1. In Visual Studio Choose Options from the Tools menu.
2. Expand Source Control in the treeview.
3. Click Visual Studio Team Foundation Server in the treeview.
4. Click the Configure User Tools button.
5. Click the Add button.
6. Enter “.*” [...]