Brian - The film was created for use in road traffic speed cameras, using a flash with the SFX filter on it so the film picks up the near IR reflection off the cars so you can put a red gel on the front of a powerful flash gun - that will certainly get the red end of the film working for you ... I've also done it using the sfx opaque gel filter, but it does reduce the output somewhat - about 5 stops or something iirc, so you'll need a nuclear strength flash gun to get some hand-holding speed with resonable DOF I reckon - definitely worth experimenting with though. You may be able to push the film a bit - I know HP5+ pushes reasonably well a few stops with the correct developer, so as far as I know, you can treat the SFX the same (although it is 1 stop slower of course) but maybe 800 is achievable with a high speed developer.
If you've going for (faux)ir on people shots, expect porcelain-like pale skins and dark eyes etc.