Remap Tis-620 Thai Fonts To Unicode?

[Veazer]

I've trying to do a brochure for a thai firm and the font they gave me is an older non-unicode font with TIS-620 mapping. Most of the content that will be in the brochure is given to me in MS Word format and I can't cut-n-paste to InDesign like I can with unicode fonts, I need to use a text conversion app (XTIS620.exe from HERE) to get Adobe apps to properly display the text. This is awkward and hard to edit later.

I'd like to know if anyone has come across any app that can easily perform this TIS-620 to Unicode conversion, ideally capable batch processing a folder of fonts.