Yes, of course! I've done it (perhaps there is a better way) and it works.

I've published my Contact From to "Personal Forms Library".
When you go to the Contacts folder, right-click on it and on the General
Tab is should show ..."When posting to this folder, use: ....."
This is where you show be able to select your new form.
I think that changes only NEW contacts you create. Old ones stay on the
standard form. If you want to changes the old ones to look like the new
one, you need to muck around with "Message Class". Look up
"DocMessageClass" in Google.
Good Luck!