power window control module 88 Accord
 

Long time ago the driver window on 88 Accord was diagnosed as having a bad power window control module. The window would go up sometimes, go down sometimes, erratic behavior. Just had the mech disable it because I didn't want to pay for one at the time. Now that I understand the beauty of salvage yards, and have done a few repairs on my own, want to go after this one. Plus, the passenger side front window starting to behave oddly also. A few questions:
1. Where is the power control mod located?
2. Are they hard to replace?
3. Any idea what going price for one at a salvage yard is? I will be calling of course, but just thought I would ask.
4. Does one module control all the windows?
5. Do the tools at NAPA that help remove the interior door panels really work? I have tried doing it without those before, and have ended up breaking off key pieces of the plastic that the panel snaps on to, and want to avoid.

thanks.