Hi,
This is what I use from within MCSP:
Code:
-P$target-device$ -F$hex-filename$ -E -M -B -L -V5
And the exutable is called PK3Cmd.exe which I don't think is the same as the standalone programmer software for the PK3.

The -V5 is said to specify the voltage output on the Vdd line by the PICKit3 so be careful if you're using a 3.3V PIC etc.

/Henrik.