Dialer interface: Shut & no Shut

I need to change the PPP credentials on a lot of Cisco 800 series xDSL routers.

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we can amend the startup config and then reload. But that's going to take several minutes for the router to boot and do it's xDSL sync.

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.. could do a "shut" and then "no shut" on the dialer interface to get it to drop the PPP session and re-establish with the new credentials - but when doing this remotely, the "shut" command will immediately drop my connection.

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Is there a "reload interface dialer0" type command?

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If not - I'll just have to do the reloads and wait for them all to come back up...

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(thanks)