Just so you know: if you slipstream the DriverPacks using nLite, it's not a true slipstream.
Absolutely agreed, however, with any Text Mode drivers I'm sure nLite will slipstream them, else they wouldn't work during the installation
Anyway, OptimusBob, just extract the MassStorage DP and point to that path in nLite.
It should then catch the INF files and add the drivers in TextMode (it will tell you so).
I guess that's what you are looking for.