Question about DNS - I think

I  am not really sure if this is a DNS issue or not so I will just explain my problem.

I working on a web server that has a couple of sites hosted of it.  It is a win2k3 server and I am using CF with Access.  I designed the site in a devlopment folder and now I want to move it to the live folder.  Right now I am using easyDNS to do stealth on the url but here is my problem:  I have a login that uses sessions and in the devlopment folder everything works fine but in the live site the session variable gets dropped after you login.  EasyDNS uses a frame set to stealth the url and when stealth is turned off the sessions work fine but then you get the full path url path to the website ex: www.webserver.com/website_folder/default.cfm - instead of www.website.com/default.cfm

Is there a way to do DNS in Win2k3 Server to point to the right folder with out using the full path?  I am hoping that this will also fix my session problem as well.

Thanks in advance,
Supa-Fly