If both cars are spyders, yes it should fit.
the window switch is bad
Before you try anything else,make sure the window lock switch on the driver side control is not turned off !
http://www.innerauto.com/browse/year/1995/2001/mitsubishi/eclipse/repair_manual/?ref=S1161368748W453914ac6fba6&label=95-98+99+00+01+Mitsubishi+Eclipse+Repair+Manual
I would get a haynes manual I have one it tells you everything and saves you tons of money if your a doityourselfer.
black window spider images
This would indicate a bad wire or bad master switch.
No, usually there is only one.
Answer: Yes, they are one unit, once the unit is removed, you can replace the regulator or the motor.
No, if only the belt is broken, all you have to buy is the regulator, which runs approx $100 - $120. The power window Motor is a separate part that runs approx the same price.
Any program you run in eclipse will direct standard output to the eclipse console window. If you want to run it in a cmd window (Windows) or a shell (*NIX), then you need to run the program yourself from outside of eclipse.
Yes
Of course not. When was the last time you saw a vehicle without a passenger window.