How does one print to a non-appletalk printer  using DMM LaserWriter Stuff.

I'm using the Serial driverand does nothig. I'vetried saving a postscriptfile and then tried sending with SendPS2.0 and it says can'topen LaserWriter Driver,
then some appletalk messagethatprinter not specified.  I'm using and imagewritwrite one cable.   Should I use a null-modem adapter?  Help...

---Lowell