Now the redirect host you can find anywhere and use. An example as you can set up your own (which you'll have to do all the work all by yourself - good for developers who want to maintain their own redirect) or use someone else's (best choice for newbie). I think Medor have one available and I just sent him a message and maybe he'll reply with some available.
Seem like UT-files.com having a misconfiguration on the site atm.
So you can add the redirect host under this in the .ini
RedirectToURL=Enter the URL here.
Well, hosting 2 servers at the same time can be done. Just set up a separate .bat (For Window user) file or something, been awhile since I've done this lol. It may also depend on the configuration you want so you can also make a separate .ini for these too. Game setting, mapvote config, etc.
Myself, I'm just using game server hosting for the 2 in my signature if that is what you are curious about.