So I tried to install this game and it asks me to lead it to the "next (.BIN) file). What is this talking about?

Multi-part installer. Make sure all the .bin files are in the same directory as the installer, .exe, and that your browser hasn't helpfully renamed any of them. It's having trouble with the -3.bin (fourth installer file listed in your shelf).

Thanks. It looks like for some reason it only downloaded the setup file but no other files. Darkstar One does not even appear under my GoG folder. It is only in my GoG download folder and there is nothing but the setup folder. I'm gonna try re-downloading the file.

Apparently that was it. I just needed a redownload. Thanks for your help!!