I need to go from the bridge district to the Slums or Government District in order to complete Bohdi's quest, but when ever I try, the game crashes. I've reinstalled, cleared the cache, tempsave, temp, override and other folders. I've tried the CLUA console, but the same thing happens. What else can I do?

Are you fully patched? If not, try installing the official patch & baldurs dash.

This sounds like a reinstall issue to me. Either the area file for at least one map district is corrupted, or the help file (the file that contains those little helpful hints displayed in the "Loading Area" screens) is corrupted.

Had you been playing this game for a while before this became a problem?

I've Reinstalled and installed the Throne of Baahl Expansion along with the patch which comes with Throne of Baahl. But the areas load about 3/4ths then crashes. I've completed most of the quests which are in chapter 2, so I hate to start all over.

ToB has nothing to do with SoA areas... You might need to reinstall SoA. Which involves uninstalling ToB *again* so you can reinstall SoA...
Sorry.