I did propose and publish:
- vmPath for (getSystemAttribute: 0)
- imagePath for (getSystemAttribute: 1)
- documentPath for (getSystemAttribute: 2)

Unfortunately, I broke things because the first too were already
defined with a diferent semantic: return only the directory part, not
the full path (as I would have understood).
I stepped back, but still must fix #testWinVM3ButtonMousePreference.
I'd like to get your opinion. I propose:
- executableName
- imageArgument
- documentArgument

Anything better ?

Nicolas