If you have applied several hacks, then it is impossible for us to tell you where you need to fix some links...

The modules
Private Messages and
Members List
that come with the phpBB port are the New version that replace Nukes PM and Member List modules. ANY links that point to PM or Memberlist SHOULD take you to the Forums MemberList and PM system.

What links are you talking about..can you be more specific?

mikem