I had never heard about this Latido. I googled for it now but found very few references and no download site. Do you have any idea where to find this?

I found this page:
http://msdn.microsoft.com/en-us/library/bb147385.aspx

And from here I conclude that this Latido shouldn't be necessary to make any app, with this flag set, to address more than 2GB. Do you agree?

Anyway, I do have the /3GB switch on my XP32 and I could never have Vue to use more than 2GB (before that happens, it crashes). May I ask how do you know that Vue6 has this flag set?