Help: Manual Related Posts/Pages Plugin needed for latest WP

Hi guys,

after trying out 3-5 different plugins I am screaming for help and really need some advice! :-O

I need a plugin for WP 3.5.2 that lets me manually assign related posts&pages to each other.

THE PROBLEM: The plugins I have tried so far ALL FAILED and DO NOT support Wp 3.5.2:
1) Manueal Related Posts
Link: http://wordpress.org/support/plugin/baw-manual-related-posts
Problem: Seems to work at the beginning but gets buggy when assigning multiple posts to pages
2) Microkids Related Posts
Link: http://wordpress.org/plugins/microkids-related-posts/
Problem: Gets buggy with posts that have NO other pages/posts assigned. I am not able to save a new page (with no related posts assigned) anymore.

Does anyone know a plugin that is supported by Wp 3.5.2?

Help!!