here is a little compound I made to retime ICE caches. The general approach can be found here: http://www.andynicholas.com/?p=362 It is working so well, that I use this little compound every time I’m doing simulations. Thanks to Andy for this great method!
Download the compound here, import it to ICE, explode it and load the caches. When connecting it to a port on a pointcloud it should work as expected, but if you connect the tree on a polymesh the “Retime Particles Part B” will stay red. This is because there is no changing point count in the cache. So simply dive in and disconnect the delete point node.