cmd add printer conditionals

I've successfully gotten my script file to add network printers to each PC when a user logs on, however I want to clarify a few things that I'm struggling with.
I need a way to essentially check to see if those printers are already installed first, and if they are, end the script, if not, then delete the old network printers from the old server, and install these new ones. Whats happening now is every time the user logs on, whether the printers are installed or not, they reinstall anyway. I know I'm probably better in vbs, but this is all I have to work with right now.

Here is my current script for the printers, excluding my mapped drive cmd lines..

REM Add printer
 RunDll32.EXE printui.dll,PrintUIEntry /in /n "\\servername\TOSHIBA e-STUDIO7030cPRO PCL 6"
     
REM Set Default Printer
 RunDll32.EXE printui.dll,PrintUIEntry /y /n "\\servername\TOSHIBA e-STUDIO7030cPRO PCL 6"

REM Add printer
 RunDll32.EXE printui.dll,PrintUIEntry /in /n "\\servername\TOSHIBA e-STUDIO5530cPRO RPCS"

REM Add printer
 RunDll32.EXE printui.dll,PrintUIEntry /in /n "\\servername\TOSHIBA e-STUDIO5530cPRO PS"


I'm not super talented at scripts and I've tried to read the long lists of cmds that MS puts out or general users, but its all starting to run together and I just need someone to at least help me with the general structure =\.

Thanks for any help you can provide!