Chris
There are a few programs out there that can adjust the amount of specular shine in a MDL file. One is Ivan Hsu's MDLC. There is also another program called Shine, I think. I prefer to use Martin Wright's MDLmat program to manually adjust the amount of specular shine...much more control going this route.
I can e-mail you a copy of MDLC V117 and V190 (with the Windows interface included). I can also send you a tute I have been working on for using Martin's MDLmat for adjusting specular shine.
Let me know which route you want to go and I will send you the files this evening....got to eat lunch and then head out to the veggie garden and get it ready for planting.
Tim