Re: Have Steam dumbed down the Alexander exe file?
ALX allows some things that are not possible with the regular exe - like the increased unit limit in the EDU or immortality. If you made use of that then the mod will crash using the other executable. If memory serves then the BI executable supports the horde function which in turn is not supported by the other executable files.
I vaguely remember that here was an issue with BI in the steam version requiring some hoop jumping, but for the life of me can't remember where it was discussed.
Maybe get in touch with a team that has released an ALX based mod?