redirect after registration

Hi,

I am using the invite module to create a public forum. The forum has it's own theme.
After a new user received an invitation, clicked on the link in the e-mail and registered he is sent to the homepage with a message like:

"Your password... has been sent to your e-mail address"

Is it possible to change the page the where the user is sent to after he registered? Because I use a different theme for the for the forum, it looks strange that he is sent to the homepage which looks completely different.

I hope anyone can help me out...

THANKS, Hannes