What you are talking about doing is called either a 'router behind a router', or, a double NAT. This does work, with some conditions. Most modern routers contain a feature usually called DMZ (demilitarized zone), and in order for incoming connections to be processed correctly, you have to put the second router in the DMZ of the first.
The router you mentioned seems to have that capability (based on quick googling), but if you don't have the admin password you are out of luck.
If you don't do this, the second router will work, and you will be able to use outgoing applications (web, email), but anything which requires an incoming connection wont be able to do that. For example incoming Skype calls.
As mentioned elsewhere, you are probably better off trying to get a non-router modem from Access.
Just FYI, it IS possible to do this with the SaskTel 2wire DSL boxes. The default admin password is the same as the default WEP password on the bottom of the unit, and gives you enough access to put a device in the 'DMZ Plus'
Hope this helps.