PPTP Needs Proxy-ARP?

I have a MT router with two interfaces, one to the Internet (Public) and one to two private subnets (Private). The two private subnets are 192.168.51.0/24, which is for customers use and 10.0.51.0/24 which is for management purposes as the network is wireless and has multiple 802.11 devices which are managed by IP protocol.

I want to set up a PPTP server so that I can connect a remote computer to the 10.0.51.0/24 network and manage devices remotely. In the second example in the PPTP section of the manual, which describes this type of setup, proxy-ARP needs to be enabled on the Private interface. The problem is, I have ARP reply-only set on this interface to force specific IP addresses on to customers. Is there a way to set up PPTP, or some other type of VPN access, that can live with ARP reply-only on the Private interface?

Thanks,
Guy

we are using ppptp-server without proxy-arp (just arp=enabled). everything works. we use an address-pool for the clients which is not in the subnet of the ppptp-server and the addresses are routed to the ppptp-server. set-default route is set on the cleint side.
ppptp-server is mikrotik router os 2.8, clients vary (mikrotik, draytek, windows, mac,…)