I have unlimited web space and unlimited bandwidth for very good price, if anyone wants the vendor info let me know. So this means when I design a website for someone I can charge them for web space and a domain name. I can make their domain name point to a sub-folder on my space. Ie.

http://www.plumbing.com points to www.mysite.com/plumbing

This allows me to keep tabs and offer more services, the only problem is once the website connects the url in the address bar changes to mysite.com/directory and I want it to keep with the original url entered.

Is there any way of doing this?