Are familar with printer inf mapping? wtsuprn.inf is the file name. Here is an example of one of mine. Notice that depending upon the driver that you use on the workstation, matters to the mapping on the server. To find what name, either look at the event logs that say it couldn't map, it will tell you the name, or look at the clients machine. see below.
"HP DeskJet 720C v10.3" = "HP DeskJet 550C"
"HP DeskJet 720C Series v10.3" = "HP DeskJet 550C"
"HP DeskJet 720C Printer" = "HP DeskJet 550C"
"HP DeskJet 720C Series Printer" = "HP DeskJet 550C"
"HP DeskJet 720C Series" = "HP DeskJet 550C"
"HP DeskJet 720C" = "HP DeskJet 550C"
"HP DeskJet 840C Series" = "HP DeskJet 840C"
"HP DeskJet 840C Series" = "hp deskjet 840c series"
"hp deskjet 840c series" = "hp deskjet 840c series"
"hp deskjet 840c series" = "hp deskjet 840c"
"HP LaserJet 4000 Series PS" = "HP LaserJet 4"
"HP LaserJet 4050 Series PCL 6" = "HP LaserJet 4i"
"HP LaserJet 4050 Series PS" = "HP LaserJet 4"
"HP LaserJet 5" = "HP LaserJet 4"
"HP LaserJet 5/5M - Enhanced" = "HP LaserJet 4"
"HP LaserJet 5/5M - Standard" = "HP LaserJet 4"
"HP LaserJet 5/5M PostScript" = "HP LaserJet 4"
"HP LaserJet 5/5M" = "HP LaserJet 4"
"HP LaserJet 5L (PCL)" = "HP LaserJet 4L"
"HP LaserJet 5L PCL" = "HP LaserJet 5L"
"HP LaserJet 5L" = "HP LaserJet 4L"
"HP LaserJet 5M" = "HP LaserJet 4"
"HP LaserJet 5MP" = "HP LaserJet 4P"
"HP LaserJet 5/5M - Enhanced" = "HP LaserJet 5"
"HP LaserJet 5/5M - Enhanced" = "HP LaserJet 5M"
"HP LaserJet 5/5M - Standard" = "HP LaserJet 5"
"HP LaserJet 5/5M PostScript" = "HP LaserJet 5"
"HP LaserJet 5P" = "HP LaserJet 4P"
"HP LaserJet 5P/5MP (HP)" = "HP LaserJet 4P"
"HP LaserJet 5P/MP PostScript" = "HP LaserJet 4P"
"HP LaserJet 5Si MX" = "HP LaserJet 4"
"HP LaserJet 5Si" = "HP LaserJet 4"
"HP LaserJet 5Si/5Si MX PS" = "HP LaserJet 4"
"HP LaserJet 5Si/5Si MX" = "HP LaserJet 4"
"HP LaserJet 6" = "HP LaserJet 5"
"HP LaserJet 6/6M" = "HP LaserJet 5"
"HP LaserJet 6/6MP" = "HP LaserJet 5"
"HP LaserJet 6L (PCL)" = "HP LaserJet 4L"
"HP LaserJet 6L PCL" = "HP LaserJet 6L"
"HP LaserJet 6L" = "HP LaserJet 4L"
"HP LaserJet 6Lse" = "HP LaserJet 4"
"HP LaserJet 6Lxi" = "HP LaserJet 4"
"HP LaserJet 6MP" = "HP LaserJet 4L"
"HP LaserJet 6P" = "HP LaserJet 4L"
"HP LaserJet 6P/6MP - Enhanced" = "HP LaserJet 4"
"HP LaserJet 6P/6MP - Standard" = "HP LaserJet 4P"
"HP LaserJet 6P/6MP - PostScript" = "HP LaserJet 5P/5MP PostScript"
"HP LaserJet 6P/6MP PostScript" = "HP LaserJet 5P/5MP PostScript"
"HP LaserJet 6P/6MP" = "HP LaserJet 4"
"HP LaserJet 6P/6MP-PostScript" = "HP LaserJet 5P/5MP PostScript"
"HP LaserJet 6Pse" = "HP LaserJet 4"
HP LaserJet 4000 PCL 5e" = "HP LaserJet 4"
"HP LaserJet 4000 PCL 5e" = "HP LaserJet 5"
"HP LaserJet 4000 Series PCL 5e" = "HP LaserJet 4"
"HP LaserJet 4000 Series PCL 6" = "HP LaserJet 4"
;"HP LaserJet 4000 Series PCL 6" = "HP LaserJet 4L"
;"HP LaserJet 4000 Series PCL 6" = "HP LaserJet 5"
;"HP LaserJet 4000 Series PCL 6" = "HP LaserJet"
"HP LaserJet 4000 Series PS" = "HP LaserJet 4"
"HP LaserJet 4000 TN PCL 5e" = "HP LaserJet"
"HP LaserJet 4000 TN PS" = "HP LaserJet"
"HP LaserJet 4000 TN" = "HP LaserJet"
"HP LaserJet 4000" = "HP LaserJet 4"
"HP LaserJet 4050 Series PCL 5e" = "HP LaserJet 4"
"HP LaserJet 4050 Series PCL 6" = "HP LaserJet 4"
"HP LaserJet 4050 Series PS" = "HP LaserJet 4"
Need more help, let me know.