To use this hack for 3.6.2
Look for this in your postbit or legacy...
Code:
<div id="post_message_$post[postid]">$post[message]</div>
</if>
Replace with this...
Code:
<if condition="$post['fieldx'] != '' OR $post['fieldx'] != ''">
<font style="font-family:$post[fieldx]; color:$post[fieldx];">$post[message]</font>
<else />
<div id="post_message_$post[postid]">$post[message]</div>
</if>
Don't forget to change the X's to whatever fields you specified originally.