Change port for usermin

Hi!

I've been using Virtualmin GPL for about 6 months now (with great success I might add) and is also quite pleased with Usermin. However, I now have a new employer which doesn't allow connections to ports other than 80, 443 and 8080 from their network. In other words, I can't read my mail from work. My question therefore is, is it possible to change what port usermin uses? For now I have just setup a squirrelmail-installation on another domain, but I think it's a hassle to use two different webmail solutions. (Also a problem with the sq-mail is that I can't get the webmail.domain redirect to work either, it still just redirects to usermin).

I appologize for a messy post, but hope somebody can help me. Thank you!

BTW, thanks for a great product!