iMac 2006 Problem

A few days ago I deleted everything off my iMac running os 10. now, when it boots it goes to a few options such as install os ect. When I try and install the os it says there was a problem and to try again later. I think this is because this os is no longer on the app store. I try to make a bootable dvd, and it didn't work. I really need help with this.

Thanks!!

 

Thanks everyone I got it figured out, now that I have my mac back im gonna make a dvd backup of lion! can someone tell me the right way to do it? im thinking going into dish utilities and burn it from there