hi riddleyw,

welcome to the forums.

Read this thread http://forums.b2evolution.net/viewtopic.php?t=10233&postdays=0&postorder=asc&&start=15 for an answer to your question.
If you need some more explanation or some assistance, please report back to this topic.

Good luck

I use a a hack of the Long Description to force a pinned post.
In your Admin, go to Blog Settings ->General tab and at the bottom you have a field to compose a long description of your blog.

I use this to create a Stuck post simply by adding the following to index.main.php

// ------------------------- END OF PREV/NEXT PAGE LINKS -------------------------
	?>
<div class="bPost"><?php $Blog->disp( 'longdesc', 'htmlbody' ); // the long description of your blog ?></div>

	<?php
		// --------------------------------- START OF POSTS -------------------------------------

I'll give both a try!