Moving webMethods IS 601 to a new environment

Hi,
I have webMethods 6.0.1 IS in HP Unix 11.x. I want to migrate this server to a new machine, I read in one of wmusers post(http://www.wmusers.com/wmusers/messages/6855/26062.shtml) that it is possible to copy the entire webMethods folder to the new machine. Is this the recommended approach or should I go for a new installation. I was wondering if I copy the folder does the registry gets updated ? I’ll be thankful if anyone can suggest any material/white papers from webMethods which throws more light on this.
Thanks