Klazmar

Seems like a pretty obvious question, but I guessed I missed finding the answer in the read me or anything else. If I start a BG Trilogy game from Candlekeep at level 1, will I eventually be able to play ToB? Because I noticed that even though I graduated to BG2 through the special transition, my game file is still in the SoA/BG1 menu. Do I need to do something special to get to ToB, or is it possible? That is, if I start in Candlekeep with the equivalent of BG1, am I stuck in BG1 and SoA?
If not, will mods like Shadows Over Soubar affect my SoA game?

One more small thing; if I left an item in Baldur's gate in a barrel before I transitioned to SoA, will I ever be able to get it back even though the destination is currently unreachable? (Feels a little like cheating, but I figure I'll at least try.)

Thanks,
Happy BGT User Klazmar