I'm with Beat, I think its best not to open up one's life to "Bad Ju-Ju."
Seriously, I am a spiritual person, and I believe in alternate dimensions of existence than our own. Simple example below:
The law of consdervation of energy states that energy is never created or destroyed, it just changes form.
OK, so let's say in one moment there is a human being, and the next moment that human being is dead. What's different? The body is almost exactly the same, but the "life energy" within the body is no longer there. Sure the brain is kaput, but let's be real, there is something missing...that's the stuff you are trying to connect with somehow.
Personally, I believe those that have passed can choose to contact us somehow, not like pop-up and start gabbing away, but somehow, and that they will do so as they see fit, and that is the best way to ensure that you are being contacted by a spirit that you wish to be contacted by, as opposed to whatever crazy one was floating around when you decided to play with your homemade Ouija board...
Just my .02.
Let us know how it goes though. Have a few shots of holy Water laying around just in case...