Ok, just checked the ISC CA and it's fine, downloaded it and viewed it in the MOD viewer and its the right one. The new one should have a single large blue impulse engine on the back and the older one two small ones, one on each wing.
Heh, oops, have missed bits off of the ISC DNT, i'll update the model and put a new .MOD file up for download soon. Is it just around the impulse and underneath the top half of the main hull your getting grey or is it more than that? if so, which bits, and what GFX card you running? Anyone else having this problem??
Let me know
Thu11s