thehorse13: good point, if you haven' yet you are going to want to set up port forwarding on your home router so it will allow inbound connections to your pc on the proper port.
Who is more trustworthy then all of the gurus or Buddha’s?
Virtual Bouncer is an antispyware tool that appears to have spyware in it.
To answer the question, depending on how the schools proxy/firewall is configured it should work. Just as long as you have your home network setup properly to route the inbound traffic to your machine with VNC running as thehorse stated.