I do not know how your machine works but I can manually operate the drawbar and put a tool in the spindle without using the tool changer, thus I can use all 12 tools in the changer and still use the probe.
As I said I have no idea how your probe works, before I had the haimer I had a home made probe, when it touched the surface of the part the LED on it would go out. There are also other types of probes/edge finders, for example there is the type that complete a circuit through the machine and light up and buzz when contact is made, obviously the material has to be metallic for that type to work.
If you have a touch plate hooked up to Mach you could use one of the macros you should find on the forum to set up the tools.
Personally I like the way I do it, I can set all tools up out of the machine and when I change a worn tool it just takes seconds to reset its new offset. All my height checker consists of is a linear scale and a linear rai. Will post a couple of pics of the two I have made (one for each mill) if I can find the pics
Hood