How to remove password field in User Profile

[Richard E]

I use http://www.DigitalAccessPass.com (DAP) for shopping cart, affiliate, and autoresponder for my vBulletin site.

DAP is integrated with vBulletin so users login via the DAP login screen (inside WordPress) which automatically logs them into vBulletin 4.1.6.

I need to prevent members from changing their passwords inside vBulletin to keep them in sync with DAP (which handles credit card billing).

So for user type=PAID, they can't have the option to change passwords on their Profile screens.
For administrators, they can change passwords because they'll know better...this will also allow backdoor fixes, if necessary.

Thanks,
Richard