sud-domains are created in the control panel and add a dns switch
In theory, this subdivision can go down to 127 levels deep, and each DNS label can contain up to 63 characters, as long as the whole domain name does not exceed a total length of 255 characters
so a sub-domain will act the same as domain name
when installing a script the path isnt mydomain.com/myscript but myscript.mydomain.com
Please try this and post back when you have it up, ok?
dont think you need the www. either ......but maybe