I am not sure of the usefullness of a Solar Powered Motion Sensor. But I do believe this is a project that needed to be done. Or... I just have way too much free time.
(http://davesdomainonline.com/images/x10forum/solareyesensor.jpg)
The amazing thing about this project was it was simple enough a five year old could do it... and setup was less than five minutes. Gosh you gotta love this X10 stuff.
As can be seen by the images (attached) I merely tapped the solar lights batteries at the + and - and attached the wires to the same on the sensor. The solar light I used has a off switch for the LED light... otherwise I would have needed to clip a wire to the bulb to shut the light part off. After all... the idea is to use the solar power to power the motion sensor... not drain the batteries on a light. To complete the project I mounted both the solar cell and motion sensor on a board.