i have a problem. I have webpage created with google apps (www.xxxxx.net). I created another one and i want to name it beta.xxxxx.net. It's hosted not on apps server. What should i do to webapage be availble under beta.xxxxx.net.

I'm not sure how you'll do this with Enom as I've never used them, but you need to setup a subdomain in your DNS and point the IP address to wherever you're hosting the beta.xxxxx.net website. You will probably be able to do this from your Enom account area / control panel.