2-ISP, 2-ROUTERS, 1-SERVER

Windows 2003

I’m trying to run two ISP through two separate routers, via one server. One router is connected to server and our workgroup, under own subnet and ip family. The other is connected to server only to handle external communicaton and services (FTP/WEB-SHOP etc) via Internet and Server.

Is it possible to get this to work?
If what would be the soloution?