Domain redirection question - CNAME? A RECORD?

[rduterte at gmail.com]

Apologies if this is the wrong place to ask - I'm new to Google Groups.

I'm trying to forward www.exampleone.com to go to
subdomain.exampletwo.com - I would need it "mapped" (not sure if that's
the right term) so that subdomain.exampletwo.com/sample.html shows up
in the URL as www.exampleone.com/sample.html

I tried setting up an A Record and CNAME, but my understanding of
either is pretty limited. To further complicate things, the host is on
a shared IP, so I have to use a domain pointer.

I have no idea if I'm doing any of this correctly, or if it's even
possible.

Thanks in advance for your help,
Ramon