Please note that every patch update will wipe your current mod setup! If in the middle of a modded game you might want to delay the patch update (if possible) as even after reinstalling the mods, you might not be able to continue with your old savegames. The Enhanced Editions are actively supported games. You must run a program called DLC Merger on your SoD installation before you can install this or any other WeiDU-based mod.
Good Old Games (GOG) and Steam both package the additional content for Siege of Dragonspear in a method that WeiDU, the tool used to install this mod, cannot access.
Special Note for Siege of Dragonspear from Steam/GOG First time installing a mod? Check out G3's comprehensive tutorial: A New Player’s Guide to Installing and Playing Mods.