is basically the postbit_author_user template. I'm not sure if the MyAchievements variable is working in this template. You can either try it out by adding
Code:
{$post['myachievements_postbit']}
to your postbit_author_user template or replace
Code:
{$post['user_details']}
with every single variable in your postbit_classic template.
The variables are:
Code:
{$post['postnum']} - Post count {$post['threadnum']} - Thread count {$post['userregdate']} - Registration date {$post['replink']} - Reputation {$post['warninglevel']} - Warning Level