If I had my XOOM on me I would let you know step by step. Now that root users have sd and clockwork ill have to cook up some zip files. Ill get back later tonight if nobody jumps in.
If you don't want to use the app you can just connect to USB and then on the computer add what ever notifications you want in the appropriate folder (ie notifications. alarms) and then go into what ever notification you are try to set on the tablet and select it.