remote play with dualshock 3?

can i use my ds3 as a controller instead of the keyboard with remote play on a laptop?

There is a Dualshock 3 driver for PC (unofficial), you could probably use the PS3 controller (wired) and map the buttons to the controller.

Try Motioninjoy, you need to spend a few minutes mapping the buttons but it works really well, it even has a bluetooth option but needs its own driver so more than likely when the driver is loaded your bluetooth will only work with the controller.