CakePHP root install with WPMU subdomain install help

Previously... I had an existing PHP site with the typical gallery and forum...

I then had WPMU installed by a developer that got it working on the root without replacing my existing PHP homepage... users could sign-up via a direct link and create subdomain accounts with no problems

I recently replaced my core PHP site with CAKEPHP which has a different root structure..

I am still able to login to wp-admin but i can no longer see subdomain acccounts...

is anyone available to help? I guess i need someone with expert HTACCESS skillz and some knowledge of how CAKEPHP works...

thanks