I need to make a domain name I have parked on one of my accounts the main domain, and make the main domain the parked domain... Whats the best way to do this without having to recreate the account entirely? Or is there no way.

Well, be safe. Recreate the account if not in future you might have problems :D

If you are not the Hoster you will need to contact them.

After the Parked Domain name has been unParked, the Default Domain name for the account can be changed, using the 'root' WHM. The account DNS settings in WHM should also be checked after the change.

As WS-Rob says, there are 2 steps...

1, unpark the domain
2, use whm to modify the accunt to be the alternate domain

if you dont have the rights to do that on the server, create a support ticket with your host.

it's a *realtively* simple process, you'll lose any custom DNS entries when you unpark the domain etc, and *sometimes* you have to manually kill and restart httpd - your host should know all of this already