The TeraGSS and tdicu are 'required' prior to installing the new odbc driver. MDAC is also required if it isn't already there, for example, WinXP.
Along similar vein (hate starting new threads unless really necessary), I have a question as well. I need to roll out ODBC update to many users, but would like to make it as painless as possible. This was OK in earlier iterations of the driver, but now there's the TeraGSS and tdicu requirements. They are bundled with the ODBC package, but do NOT get automatically installed. Is there a way to 'silently' install all 3?