Need a condition for attachments row

[VADOS]

Hello everybody!

I'm making some special mod for my board and now expecting one problem.

There is an options in "General vB options" -> "Attachment options" called "attachrow" - you can set a number of attached thumbnails for each row.

Now I need to make such a condition:

PHP Code:

<if condition="$foruminfo['forumid'] == 3">
show 1 attached thumbnail for each row
<else>
5 attached thumbnails for each row
</if> 

Please help the beginner (i.e. me ), what and where should I change to make such a condition?

Thank you!