we are looking to build a new GroupWise mobile environment and wanted some advise as to how others have build there environment.

questions i have:

1. how many users goes 1 groupwise mobile server support, how many do you Novell recommend?
2. do i need to have a secure gateway for each groupwise mobile server if or can i use one secure gateway and multi groupwise mobile servers?
3. if i install two groupwise mobile servers, can i get them to act as one so if one goes down the other take over...like a cluster? is there a guide to do this?
4. if i install a new groupwise mobile server can i copy a database from a old one to the new one? will this just work?

thanks in advance for this advise.