Help! Editing Low Resolution Models

I'm trying something simple: Changing the Egyptian Pharaoh's Guard unit from a "Spear/Shortsword" phalanx spearman unit to a "Shield/Longsword" heavy infantry unit.

And much to my surprise, it worked great!

I used 3ds Max 7 to remove the original weapons, and add the new weapons from other units (Barbarian Chosen Swordsmen & Eastern Bronze Shield). It was actually much easier than described in the relevant tutorials - it takes just a couple of minutes once you know how.

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But here's the fly in the garum: I can't seem to edit the low resolution .cas files. So my cool new Egyptian Guards look like they have the spears again if I zoom out.

Specifically, if I modify the low resolution files with 3ds Max 7, and then try to use the script "CAS_IE_b69.ms" to export them, I get an error:

"Mesh has no TVFaces", and the script crashes.

Even if I import a low res .cas file, then try to immediately export it with no changes, I still get the error.

Any suggestions?

By the way...

Garum: A condiment or sauce widely used by the ancient Greeks and Romans.

Take some small fish, the intestines of some larger fish, maybe some oysters, salt them, maybe add some vinegar, pepper and/or other spices. Then set this in the sun for several days. At this point it is called liquimen. As this appetizing mass of stuff would ferment and putrefy it oozed a liquid. This liquid is garum. Used as a seasoning in cooking and also as a table condiment. There are several modern versions of this: Pissalat from Nice and nuoc-mam in Vietnam are two of them.

From www.foodreference.com!

Hm, heres a way around the problem (not a solution). Just use the high quality model for the low res ones as well. This way you'll get no probs. If you have a fast comp, it will be fine.

OK, I guess I could do that. Does this mean that there is no fix?

PROBLEM SOLVED, more or less.

Thanks.