Both IE and firefox will attempt to use the "best" connection automatically. You can make ie dial the connection but it will use the fastest ip path available (and that should be the broadband).
Well my friend has bought an Acer Vista desktop and I was going to give them an external 56k modem to use as they only have dialup on their old comp at the moment so want to use dialup on their new one until they get BB.
Any special reason you want to support dialup AND broadband ?
- as a backup, its not a problem
- for dialup to a Company (disconnect the broadband or ask for their VPN access point/method)
ANO reason ?
else just connect only the one you want to use at any one time.