If you're talking about synscan based PEC then no you can't do that - not unless you wire up your own hardware/software to triger the direction keys on the sysncan in response to ST4 or pulse guide commands. When EQMOD is used the handset is redundant and plays no part in controlling the mount. EQMOD provides its own PEC implementation and to use it all you have to do is capture an unguided log of star movement over several worm cycles (this can be done with PHD if you want). You then use PECP