Oh i'm sorry, i was sure i replied to this thread (maybe i had some problems with my connection).
This isn't the proper way to do this but at least it works!
PHP Code:
if ($this->userinfo['field16'] & 1)
echo 'your code for fisrt option';
if ($this->userinfo['field16'] & 2)
echo 'your code for second option';
if ($this->userinfo['field16'] & 4)
echo 'your code for third option';
etc..