The "56kFlash.zip" file contains detailed instructions and firmware flash files to upgrade 25 Mhz Courier V.Everything V.34 (33.6k) modems to X2 & V.90 enabled 56k operation. This is the all-in-one stop shopping you've been looking for. Let's hear it for documentation with those driver files. Bon Appetite!
--All Knowing Master of Time Space and Dimension