How do i root my Android by Pantech?

I have a Pantech Sirius Alpha. Its an Android phone made in Japan and in Korea (I believe). I have done the ADW Launcher deal and the Better Keyboard with different skins. I have enjoyed freeing up some of the things that I didn't like about my phone before, but I want more. I wanted to root it also because I'm leaving Japan and returning to the US. I can't just throw in a different sim card and call it good. I need to wipe everything out and install US stuff. can someone help me out with that? That's a Pantech Sirius Alpha or try AU IS06.