In windows XP there is a VBScript called prnjobs.vbs that permit to manage printer queue from cmd.
For display printer queue:
cscript prnjobs.vbs -l -s SRV -p "Printer"
For delete job 1 from printer queue:
cscript prnjobs.vbs -x -s SRV -p "PPrinter" -j 1
Here you can find the documentation: http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ntcmds_new_tools.mspx?mfr=true