Easy as a very easy thing indeed.

Final question, are the printers all attached to the same print server?

If so you are in for a real treat.

Here is some sample code which assumes:
1) The print server is static.
2) The group names areformal and consistant.
3) So are the printer names.

Given that your print server is "\\MyPrintServer", your groups are "Printer: HP1", "Printer: Colour_HP2" etc the following (untested) should work:

$sPrintServer="\\MyPrintServer"
$iIndex = 0
$sGroup=EnumGroup($iIndex)
While $sGroup
        ; Not interested in domain.
        If InStr($sGroup,'\') $sGroup=SubStr($sGroup,InStr($sGroup,'\')+1) EndIf
        If Instr($sGroup,"Printer: ")=1
                $sPrinter=SubStr($sGroup,10)
                If AddPrinterConnection($sPrintServer+"\"+$sPrinter)
                        "ERROR "+@ERROR+": "+@SERROR+@CRLF+"While mapping "+$sPrintServer+"\"+$sPrinter ?
                Else
                        "Printer "+$sPrintServer+"\"+$sPrinter+" mapped ok." ?
                EndIf
        EndIf
        $iIndex=$iIndex+1
        $sGroup=EnumGroup($iIndex)
Loop