[h323plus] Using a gatekeeper without registration ARQ/DRQ messages only

All, We have a request from a client to be able to use an external H323 Gatekeeper, without registering with that gatekeeper. In brief they are requesting that ARQ/DRQ messages only are sent to the GK and no RRQ/IRR. I have started to look into overriding the H323Gatekeeper class and providing a new gatekeeper (via SetAssignedGatekeeper() with a m_needToRegister=0) but am not certain if [a] this is the correct way to do this [b] whether there is an easier method or [c] whether the requirement can be met with h323plus (or is actually valid). Your comments would be much appreciated. Many thanks Mark