frequent crashing and other various problems

I am making an animation of a fairly large assembly and wantto have a blank site with assemblies and parts fading in using showand hide function. But the problem is that it will either fadesomething in then the next object wont or will only half fade in.So i tried another angle in editing the appearance of the assemblyto transparent in hope that i would be able to edit it further downthe time line and change the transparency back to solid. Theproblem there was i think the assembly was too large and crashed asi went to edit appearance. So i was wondering is there another wayto achieve this fade in style animation? or a way to get the othertechniques to work.

thanksSolidworksMotion Studies