Disclaimer: this is by no means an official update. It should be used for test purposes only and it certainly isn't officially supported. Furthermore, the accompanying documentation has not been updated (yet).
1) Grab the latest snapshot of the BG2 Fixpack from the GitHub devel branch
2) Click on the ZIP button to download the archive
3) Unpack the archive contents to your BG2 folder
4) Rename the folder aVENGER981-BG2-Fixpack-someweirdhexnumbers to bg2fixpack
5) Download the latest WeiDU from http://www.weidu.org/~thebigg/ and unpack it into your BG2 folder
6) Copy WeiDU.exe into your BG2 folder
7) Rename WeiDU.exe into setup-bg2fixpack.exe
8) Run setup-bg2fixpack.exe
Be advised that some of the content from this snapshot might not make it into the final release. The status of every change is decided through a detailed review process. Until that happens, all the changes presented here are tentative at best.
Edited by aVENGER_(RR), 08 January 2012 - 10:16 AM.