> Can someone tell me where i can find the build up animations for TS in the mix files?
> Thanks in advance.

They are mostly in isotemp.mix and isosnow.mix.

They are all called *mk.shp, so just goto File=>Find in XCC Mixer, and type in *mk.shp and this will tell you where they all are.
Check the art.ini file to find out which structure uses which build-up file.