There was a topic on this a few days ago, so you might want to search for it.
Level 9 is pretty easy, once you figure out how to use the center links on the bottom. The link is on the different plane as the bridge, so you need to use the "F" and "R" keys to move between the levels.
Once you figure out how to build the center pylon, just use cables to connect it to the center links of the bridge. Voila, level solved.
My solution ended up looking like this:
|\\/|\//|
=====
     |
NOW, if you you think THAT is hard, try finishing level 10 on hard without breaking any links! 
