Londo,
You can find 2 additional B5 shipsets at the XRSTO Empire Site
http://bossi.com/chris/ The Army of Darkness and the Army of Light. I used the Army of Darkness shipset to create a Shadow race to vie with the Earth Alliance.
To do this, I created an AoD folder in the races directory and put the contents of aod.zip in there. Then I started a game, and used "Add new" to access the race/shipset design. I then built a Shadow Hegonomy empire around it (and then saved the empire file).
You may put what characteristics you wish for your Empire, here's what I selected. Firstly, the Psychic advanced trait .. "a scream in your mind", manipulation of telepaths, etc. seemed to fit. Also, Superior Attack and Impressive Intelligence seemed good. To get these traits, I lowered Political Savvy to Pathetic (traders they ain't) and Physical Strength to Weak (stronger than a Vorlon maybe, but that's not saying much). I also chose a Warrior culture with Aggressive Demeanor and Bloodthirsty Happiness. I used the ravager.txt design file for fitting ship names. For Environment, I chose Rock - None, but was somewhat unhappy about the small number of planets which fit this type.
With the EA using Natural Merchants and the SH (Shadow Hegonomy) using Psychic, this would leave Deeply Religious for the Minbari, and Organic for the Vorlons.
Good Luck!