Check out their web site
http://vacareers.com to see if there is some info available through a link therein.
If you can't find what you want there, I'd make an appointment and visit the NR and DON at your local VAMC, as well as the financial aid office at the school that interests you to see what these people have to say.
When I worked for the VA, all these upgrade and certification programs were available only for people who were already employees and/or were already halfway through the program in question, but one never knows whether the rules have changed (it IS the federal government, after all).
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