Why not try our
Fastlane checkout module?
It's FREE and comes with all the supporting code, css & graphics you might require..
You can grab it here:
http://www.xcartdesigner.com/xcart-fastlane-mod.html
We developed 2 versions of this module - depending on the amount of space on your page you can go with the "standard" or "linear" version.
Let me know if you need a hand
