It looks like you will find access to a large amount of information for a great website, but, I believe you also have the
opportunity to publish a book on this unique organization which would contribute much to our civil war lore.
If you would give me your email address, I would like to offer some assistance in your research efforts.
I also copied the battalion's record of events at the Univ. of Nevada, Reno library today from Broadfoot's Supplement to the Official Records. If you do not have access to these volumns I can mail to you.
"Another important intelligence-gathering group was the Thirty-ninth Battalion of Virginia Cavalry. This battalion was commanded by John Harvie Richardson of Richmond, a prewar militia officer and author of a Confederate infantry manual, who had served as a lieutenant colonel and colonel of the Forty-sixth Virginia Infantry Regiment. In September 1862 he was commissioned a major and assistant adjutant general and was ordered to report to Colonel Shield, who commanded General Winder's Camp of Instruction near Richmond. Shortly thereafter, Richardson appeared as the commander of the Thirty-ninth Battalion, which furnished couriers, scouts, and escorts for Generals Jackson and Richard Ewell. In 1864, the battalion was working with Lee near Petersburg. Apparently it was organized and trained specifically to conduct intelligence-related activities.7" [The on-line copy does not provide access to this source reference]
[Come retribution By William A. Tidwell, James O. Hall, David Winfred Gaddy, pp. 109/10]