i've had no problems following the faq in the sticky thread on these forums - suck it up and try again
re-install both games doing full installs and then apply the offical patch and fixpacks using the links in the sticky thread
personally i would play bg1 using tutu (it's really good) again follow the link in the faq to the pocket plane modlist to get the current links for tutu and any other mods
i don't know about bg1 mods but for bg2 i hear good things about 'unfinished business' for adding quests and dialog and the tactics mod definitely makes the game more of a challenge although some bits are a bit ridiculous - ask or read around for some ideas
a search on 'mod install order' will tell you all you need to know about that