Hi.
If your already running EQMOD, when you choose the mount in the ASCOM dialogue box in Starry Night, go into properties, I think it is, and on the settings for EQMOD you will see stuff like Baud Rate, Time out, etc. Down the bottom is another box(small box) that says something like "enable pulse guiding". Ensure that this is ticked and close it. Using your Starry night, connect as normal to EQMOD and your scope, open PHD and at the top where it says telescope, select ASCOM, I think it is,and then click all the buttons to connect camera and scope. Next, loop your exposures with the arrow button to find a star, press stop, then select a star, then press PHD button. PHD should go through a calibration routine, then start guiding. You may have to fiddle around with the settings in the "brain" button to get it all to work best, but shouldn't be too hard.
I'm not out in my control room so I cant tell you exactly all the right buttons, which is why I have listed them as "I think". SORRY!
Hope that helps, as you don't need a connection to the guide port with this method. I have a GPUSB and cable just sitting there getting dusty, thanks to the great work by the EQMOD team.