Hi mates,
we had this discussion in the German forum "Marinesims" too!
I prefer
PICPICK!
Besides the fact it is available in different languages it gives the possibilities of setting the key(-combination) for the Screenshot, filename, type, folder. Furthermore there are tools like a colour-picker, rulers and more...
But there is one important setting for sh3.exe with Win7:
Rightclick it, choose Settings - Compatibility - and enable the 4th at Settings: "Disable Desktop Design" (or similar - got a German W7/64 here).
And the best of all: IT'S FREE!
Regards
Blueduck