This is the best list I found. (see variables table as well for exp setting)
Character creation - My preference was to just delete the entries.
Code:
0 - classic
1 - ruins of kunark
2 - scars of velious
4 - shadows of luclin
8 - planes of power
16 - legacy of ykesha
32 - lost dungeons of norrath
64 - gates of discord
128 - omens of war
256 - dragons of norrath
512 - depths of darkhallow
1024 - prophecy of ro
2048 - serpent's spine
4096 - the burried sea
8192 - secrets of faydwer
Add the numbers up to give you the expansion you want.
0 + 1 + 2 + 8 + 16 + 32 + 64 = 123 (For GoD)