You need at least 1 microswitch to engage the solenoid.
The pics you can either use a picture host like
www.imageshack.us, upload your pictures there and they will give you a url you can post
OR if you want you can upload them to BGW as an attachment. You will have to resize the picture to a resonable size.
More info here...
http://www.buggiesgonewild.com/annou...ing-101-a.html