Hi Slapstick,
I'm voting "send it back"! In addition to your installation issues, I don't think you will be very happy with the video quality of the X10 cameras. Even the "low-light" versions need a lot of light to produce a good picture. So now you're talking adding floodlights, etc.
I think Videonut had the right idea when he suggested you check into Blue Iris (
http://www.blueirissoftware.com). That single piece of software will meet all your wishes for recording, remote viewing, sending you an email or text-message when triggered, etc. It even includes variable-sensitivity motion-detection as a software function, triggering email, etc. if it "sees" motion. It's available in a free trial version, so you can check it out before you buy. If you couple this with a couple of good IR (infrared) wired cameras (something like this
http://www.surveillance-video.com/sb-420hi.html), and a multi-camera video card for your PC, you'd have all you need.
Moving slightly higher in price, if you already have a home ethernet network, you could use I.P. (network) cameras. This avoids the need for for the multi-camera video card in the PC, since the video just travels over the network to get to your PC. This is by far the most flexible choice. If you have a Wi-Fi network, you could even use the wireless I.P. cameras, though you'd have to find a camera with a detachable antenna so you could extend it through that metal siding and get it
inside the house.
This doesn't have to cost you a fortune, either. Example:
Blue Iris Software - full version - $49.95
I.R. cameras - $70 each (maybe cheaper if you shop around)
4-camera video-capture card - $75 or so
So if you can run some cable, you'll probably spend less than the X10 stuff would cost you!
By the way, I use Blue Iris with my four X10 RF cameras - because I've had the cameras so long I can't send them back. It works
much better than the video portion of Active Home Pro!
Best of luck with your project. Don't give up!
ITguy