Is it in anyway possible to have my own sub domain on forums?

I brought www.cherrydesigns.net from forumotion is there anyway I can have another forum like http://testsite.cherrydesigns.net ?

Fraid not cherry the only way is to purchase another domain name.

then how do forumotion have http://somthing.forumotion.com/ etc?

Because they on the suffix part of the link.

the what?

suffix-letters added to the end of a word example: imagineation
"tion" is a suffix, without tion it's imagine
subdomains are like suffixes, they are added to the end of the website name, that's a subdomain, there is no way you could put a sub domain in the beginning of your site title

but thats what forumotion do.

I dont really care where the subdomain bit goes just want to know if its possible, even if i have to pay for the space

I don't really get this, subdomains are usually the forum creators, or the name of the forum creator, and the first part is your name of the site, do you want to have a webhosting company??

No I run a skin and graphics site and I want to have a few test sites connected to my site if that makes sense