Hi there (I'm actually an MS-I at COMP),
is this open house you're referring to the OMAC conference? (Osteopathic Medical Awareness Conference) I highly recommend attending that conference if you're anywhere in the area.. to get a sense for what the school looks like, walk around and talk to some students/profs, listen to the student panels, and perhaps gain a little more experience that will help when interviewing at COMP. (One of my interviewers happened to be the doctor who gave the OMM demonstration the day I attended OMAC)
Hope this helps..