I'm hoping I can explain this well.. Say my site is xyz.com and I have another site called abc.com.. Is there a way for me to setup my sites so when somebody types in http://abc.com.xyz.com my site xyz.com will show up? What is this called and how would I accomplish this? Let me know if you need more explanation..
make two subdomains for xyz.com subdomain .com.xyz.com and subdomain abc.com.xyz.com and redirect the final one to xyz.com not sure why you'd want to do this but, im sure you've got your reasons. lol Be careful with subdomains, due to Google recent blunders in dealing with them I suspect thyey will be getting much more tough on them very soon.