You will just change some settings on your Miami.
Then all your software will work on your ADSL automagically.
But first u will need an ethernet port on ur miggy.

Can u find out what ports will be on the router?
If the phoneco gives u a choice of a USB router or a Ethernet router then stomp ur foot on the ground and demand the Ethernet version!
P.S. ur Ibrowse will be a LOT more fun on DSL than on dialup. :-D