We tried to make slightly more interesting Neutral AI's for the races in B5 - though the only complete ones are the Gaim and the Llort. The Hurr are almost done. The Markab, Yolu and Grome are barely started. Not sure if this is in line of what you were looking for.
B5NeutralRaces.zip
Also made a standard race (the Shadri) that tends to remain Neutral in most matters (if that is more your intention), tried to focus them on research and not to get mad at simple things like ships in their systems (though they do get mad once attacked and don't forget as quickly). Also rewrote most of the speech file.
Shadri1.49_Update.zip
Shadri.zip
<Edit - added Shadri link>
[ 01 March 2002: Message edited by: Val ]