In XSI, how can I get the 4 screens for different axis'? I want to use that, so it's set up like Milkshape... Help-thanks

Welcome to Gametoast.

By default, you should see the 4 viewports after launching XSI, these include Camera, Top, Right, and Front unless you tweaked your event settings.
If you launch XSI and only see 1 viewport then hover your mouse cursor over that viewport and press F12 to minimize it to reveal 4 viewports, or click the little square button in the upper righthand corner of that viewport.
You can find all of the answers you seek about XSI's user interface by pressing F1 and searching the Help files.

Thanks and Sorry. :]