A: W3GPC was designed to work on Windows. Recommended is 'Windows 7', but older versions shouldn't cause any problmes. Hardware requirements are easily fulfilled if Warcraft III runs.
A: NO! Because we do not modify the original. All the modification happens in a temporal copy.
A: It's just for installation. If you don't trust the installation of W3GPC, set the registry keys urself (info about important keys)
A: Make sure you watch replays by opening the replay files (rightclick->open or double click). If you watch it ingame via View Replay W3GPC gets bypassed and has no effect!
A: It's clean :) If you don't trust me, download the source code (it's open source), read through it and compile it yourself.
A: You have to delete it by hand. Removing W3GPathCorrector.exe should be enough. I don't think its worth the effort to delete the registry keys and the temporary files. But if you wan to, feel free (info about all files and keys)!