I am playing with BGT installed, and have just defeated Jet'laya's sister, and am trying to leave, but all area's list as unreachable. Tried to Clua to new area say AR2400 Peldvale, but it instead sent me to BG2 area with the mindflayer brain room . Any suggestions would be appreciated. Thank You

Well, so that they don't mess up the BG2/SoA stuff, they renamed all the BG1 Areas. If you want to go to Peldvale in BGT, it's AR8900 in BGT

As for the Forest of forgotten Souls, I am not sure what Mod added that. but you should report that bug in the proper mod forum.

The Forst of Lost Souls and Jet'laya are from Dark Side of the Sword Coast, the forum for which you can find here: http://forums.spellholdstudios.net/index.php?showforum=202

Thank You for the help