Thank you. I think that is one of the reasons I liked it too, you can use her in many ways. I can have her even sitting in a chair and looking freaky. As I joke, i wanted to lay her in bed with me, but my wife forbaid me into doing it (L).
Kimcfadd is correct, sprinkler heads are triggered by heat or if the get bumped/broken. The fog will not harm them. If the building has a fire system you do need to be concerned if there are smoke detectors as the fog will certainly trip them. ;)
If you are unsure, you may want to find out if there is an alarm company that monitors the fire system in the building (if there is one) and talk to them. The last thing you want to do is roll the authorities out to your site as it may carry a...
Not sure about the motor, but I have had success replacing those "rubber band" style belts with O-rings. I found some in the plumbing department at Lowes to replace the belt in my Donna the Dead. Worked great. They even have a size chart if you take the old one with you. :)
We sell 2 versions of that kit now. http://www.spiderhillpropworks.com/Animated-Prop-Kits_c_12.html . There is also some of the basic hardware needed to build your own.
The entire plans for it are on our site as well and you are free to download them. http://www.spiderhillpropworks.com/Halloween-Prop-Plans_ep_41-1.html