In Chapter 2 your character/s are only around lvl 10 - 16 (depending on your class of course) which is pretty low. Too low to take advantage of high level spells and abilities so it's not worth installing ToB for this reason. However, if you'd like to raise your xp up to this point, there's a funky little dungeon called Watcher's Keep which has more to offer than ANY other area you can access in chapter 2 and it IS worth installing ToB for this.
small print
i suppose i should warn you that WK is also harder than any other area you can access in ch2. good luck [img]smile.gif[/img]