TweakTown posted a guide about replacing memory heat spreaders
>> How To Replace Memory Heat Spreaders
Welcome to another session of void-your-warranty, as today we will look at upgrading the stock heat spreaders on a pair of Kingston DDR2 memory modules.
What we will do here is run through a step-by-step of removing the plain flat aluminum spreaders that come with most RAM modules and upgrading them with some Nexus HXR-550B Heat-Pipe memory coolers.
>> How To Replace Memory Heat Spreaders