Does anyone else work with very large non native Solidworks files?  I have to work with rather large/complex files that have been converted.  Despite doing everything that I know to do (speedpack, PC tweaks etc..) they are rather painful to work with.  For the most part it is ok, however when you try to save, or insert a part, or do certain commands it almost seems like it is rebuilding and you have to wait a couple minutes.

Just wondering if anyone else is very dependent on files that are not SW, and how you deal with them.

We mfr ambulances and rescue vehicles, so I am getting the files from Ford, GM, Dodge etc..  I then add on our parts to the chassis.  That is why we are working so much with files not native to SW.  Comp specs are as follows: Dell T3600, Intel Xeon E5-1620 0 @ 3.60GHz, 32gb of ram, 64 bit, with NVIDIA Quadro 2000 graphics card