Using RAS for Routing of IP packets
Note: one step is not clear, be sure that DisableOtherSrcPackets is 0 Registry: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\RasArp\ Parameters Add Value name: DisableOtherSrcPackets Data Type: REG_DWORD Data: 0
There is also an older MS technote describing bugs in their other documentation. Try this query and read them for yourself:
Search MS NT Knowledge BaseOr, for convenience I have concatenated the documents here.