INT 61 - Banyan VINES - INSTALL SERVICE HANDLER                                 
	AH = 03h
	AL = service ID (see #03451)
	DS:DX -> new service handler
Return: AX = 0000h successful
SeeAlso: AH=00h,AH=01h"VINES",AH=02h"VINES",AH=05h"VINES"