07-18-2007,08:48 AM
If the remote is not a Sony one, and comes with it's own sensor, there aren't any guarantees that it transmits data using any particular protocol, it might use something proprietary that is incompatible with the Sony built in protocol. This is especially true when it is one designed to control many other devices (like yours).
It might even use a different wavelength or carrier frequency.
Unless you have any specific information (e.g. the remote manual) telling you that it should work with the built-in PS2 sensor, or have proof that some else has done it, you may be wasting your time.