I really don't think you need to make a distinction between the MSI card and other non-MSI cards. What works best for one Ti4200 card works best for any Ti4200 card. I wouldn't bother too much with the official MSI drivers, simply because they lag behind the offical Dets in terms of development and release times etc.
I have an MSI 128meg card and I use the Det 30.82s and much prefer them over the 40.xx or 41.xx, simply because they seem to be more compatible with older games. If you don't play older games, then I would suggest you use the Det 40.72 WHQL drivers.
Athlon XP 3200+, TT Silent Boost (its rubbish as well as loud) Gigabyte nForce2 mobo (stable but lacks tweaking options), GF4 Ti4200 128mb, Lian-Li V2000