If the driver is Socket Services compliant, you need to track down a
Socket Services driver for your Cardbus socket controller (i.e. the
Ricoh).  It may or may not exist.  My sources say you need to use the
Socket Services driver for the Lattitude CPX, C600 or C610 models.  This
is at the Dell site.
   

I have little confidence in finding anything I need at Dell's website.