NOTE: More detailed installation instructions are included with the download.

Remove all content from your Override directory in both you install directory and your My Documents Directory (...Program Files/Atari/Neverwinter Nights 2/override AND Libraries/Documents/Neverwinter Nights 2/override)
Place all 6 .RAR files into your Neverwinter Nights 2 My Documents directory (Libraries/Documents/Neverwinter Nights 2). Use "Extract All" on all 6 parts
Select "Yes" to merge all folders
The installation is now complete. To play Baldur's Gate: Reloaded, launch the game normally and select "New Campaign -> Baldur's Gate: Reloaded". Enjoy!