Editing Presets Blind - Yes. In the presets hud, in a context menu, above all of the snapshot options, "edit presets".

TripleHead - Maybe. I recently did a project where we used 2 TripleHead's for 6 outputs. It worked flawlessly. Lots of people have had lots of problems trying to do this, depending on the abilities of their hardware. Search this forum for "TripleHead" or "TH2G".