ok, reading the first post again (was a long time ago), it seems the Cm15 support works directly from this plugin, so not over xAP. In that case its actually simple, you need an Cm15 directly connected to the MP server. And you loose all other options.
Also there are option for homeseer (see post 1) but I cant seem to find any for activehome to enable it xap.
If someone sends me a CM15 i would be able to build a xap program that support CM15 and Cm11 but that would not solve your problem since activehome still would not support the xap.
So it seems the only sollution is to use a second cm15 for you two, and since it uses a special script program it may very well be the case it wont run on vista 64, but I can also not confirm that.
Also there are option for homeseer (see post 1) but I cant seem to find any for activehome to enable it xap.
If someone sends me a CM15 i would be able to build a xap program that support CM15 and Cm11 but that would not solve your problem since activehome still would not support the xap.
So it seems the only sollution is to use a second cm15 for you two, and since it uses a special script program it may very well be the case it wont run on vista 64, but I can also not confirm that.