You'll have to do some .bat editing, but it is very easy. The highest health tweak is no problem, but the .PDF explicitly warns against the Spell Progression tweaks because they are either already added by another mod or conflict with the rulesets added by another mod. If you want to do that, follow Jarno's advice.
To get the max health tweak into your installation:
-Open the BiG World Install.bat file with any text editor (like notepad).
-Scroll down until you find this block:
%IFES%BG2_Tweaks%S%BG2_Tweaks%L%0%SK% 2300 3031 3050 3060 3121 3125 --logapp | %M%
%IFGS%BG2_Tweaks%S%BG2_Tweaks%L%3%SK% 2300 3031 3050 3060 3121 3125 --logapp | %M%
%IFHS%BG2_Tweaks%S%BG2_Tweaks%L%8%SK% 2300 3031 3050 3060 3121 3125 --logapp | %M%
-Insert the component number for the Max Health tweak (component numbers are listed in the .PDF). You'll find that the component number for Max Health is 3000 (3001 for NwN-style).
-The block would then look like this:
%IFES%BG2_Tweaks%S%BG2_Tweaks%L%0%SK% 2300 3000 3031 3050 3060 3121 3125 --logapp | %M%
%IFGS%BG2_Tweaks%S%BG2_Tweaks%L%3%SK% 2300 3000 3031 3050 3060 3121 3125 --logapp | %M%
%IFHS%BG2_Tweaks%S%BG2_Tweaks%L%8%SK% 2300 3000 3031 3050 3060 3121 3125 --logapp | %M%
-That component only benefits you, the protagonist. If you wanted NPCs to get the benefits of it, you'd need to use the follow-up tweak to do that. With that, you have the option of giving max health to Party-NPCs only (3012), to all creatures in the game (3010) to level the playing field, or to everything BUT Party-NPCs (3011) to make it a little more difficult on yourself.
-Make the changes you want, Save it, and close it.
Edited by AndrewB, 30 April 2010 - 06:31 AM.