URL "Masking"

Hi,

I need redirect my domain to the a different server. For example I need to have URL point to me.dyndns.org. I have done this with out problems but I would like to have the address bar still display URL

Is there anyway to replace "me.dyndns.org" with "www.mydomain.com" in the address bar? I'd rather not use frames.

me.dyndns.org is running Apache 2.

I heard that this might be possible to do in .htaccess, but do I edit the .htaccess file on the URL server or on me.dyndns.org?

Thanks!