Print Drivers....

I am trying to print a file that the previous designer (the person i am replacing)  has printed in the past many times. we have 2 print drivers that we use.  I have little knowledge of what the differences are between them, but I was told to use our PCL to print Business Cards and the PS to print eveything else. 

This project contains a few Jpegs, some fountain fills and some solids.  I printed with the PS driver, since this project was not a business card, and the fills all looked great but the Jpegs were all washed out.  So I tried with the PCL driver and the Pictures looked good but all the fills were way off when compared to my sample.  I am the only designer in my office and the previous designer left on bad terms so I have limited resources.  Any thoughts?