We've added a new SIMTools command for testing: !portal
You can use this command to swap HG servers without going through Gamespy. Just type: !portal 111 (replace 111 with your server of choice, 111 through 118).
There will be a password box, but you can leave that box blank (it's for server password, which we don't use on HG). Just hit Join and you'll be brought to the character select screen on the target server.