nircmd.exe shortcut "%LaddsUSB%\DriverPacks\PENetworkDrivers.cmd" "~$folder.desktop$" "Lan Driver Install"
Instead, on Win7PESE, I guess (not tested on cmd now) you can create shortcut for such cmd, than pin it(or a shortcut for cmd.exe with parameter like you write ;))Shortly Add_Shortcuthttp://theoven.org/index.php?topic=50.0to create a .lnk first,than use Add_Pin or use Win7PESE\Finals\"1 - Pins"
Sorry, I see you said task bar and not desktop.