Two ISDN Lines – 8 Computers Help

I have 8 computers that I need to hook up to two ISDN lines. I currently have one 16-port hub that they share. This hub is connected to our Novell network. These computers will be moving to a new building and they will not be connected to Novell. I pose the following questions;

1. How should I set the network or the computers up to work with each other?
2. Should I use MS file and print sharing to let them talk to each other?
3. How can I get all 8 computers to use the two ISDN lines?
4. They will have one printer to share between them; do I use file and print sharing for this also?

I?m looking for any tips or advice.