For this to work in vb4, you only need to fix the parts inserted in the template. The product xml file seems to wkr as is.
I think these should work:
Graphical Version:
Code:
<a href="newthread.php?fork=1&do=newthread&p={vb:raw post.postid}"><img src="{vb:stylevar imgdir_button}/fork.gif" alt="{vb:rawphrase fork_this_post}" border="0" /></a>
Text Version:
Code:
<a href="newthread.php?fork=1&do=newthread&p={vb:raw post.postid}">{vb:rawphrase fork_this_post}</a>