To use torrents you will first need to install a torrent client. uTorrent is a common choice due to its simplicity and reliability. You can download it here: Ll.download3.utorrent.com
Then of course, you'll need to install it. (protip: Pay attention to the installation screens. There's one that offers you to install the typical browser toolbar, change your browser's default search engine and homepage, that kind of stuff. Feel free to uncheck those)
After the installation is complete, it's just a matter of (due to modDB not liking magnet links) copying this,
then pasting it to your browser address bar. That bunch of code launches uTorrent and gets the Grand Release installer on the download queue! It's like magic! ;P
Now, due to how torrents work, it's very important that you keep the UR GR Installer on your torrent list and uTorrent (or your torrent client of choice) running as much as possible.
That will facilitate others to get it faster.
TO ALL AND ANYONE EXPERIENCING PINK BOXES/BEEPS/SIMILAR:
The installer is believed to uncompress the files incorrectly. That would be the cause for 99.98% of the extensive amount of bugged units and stuff you may find.
To address this, a non-installer version was released. If you can handle multi-part files alright, simply get it from the corresponding links here: Moddb.com
If you need any help installing it, check this tutorial: Moddb.com