open the aircraft.cfg file and look for the [fltsimX] sections...
find the ones that regard those liveries and check if there isn't anything wrong there...
for instance, see if the model line does point to a valid model folder (if the folder is model.v11, the line should read model=v11)
see if the aircraft title is not the same as any other section
also check if the sim line does point to the aircraft.cfg file... if there is a typo, you will get that error message
i also had some problems when i installed the expansion pack... the thing is that there are more than one versions of the 737 experience (the latest is 1.2)...
you said that the southwest shamu livery works so i assume you have the winglets model which came with 1.2... so one of these suggestions should work
if nothing works, you can post the [fltsim] sections here... also post the name of your 737 experience folders (texture, model)... i'll try to figure out what's wrong
Moach
PS oh, and thanks for downlading the 737 Experience
