NZFF

This month's PC World pointed me to this handy tool, take as many screenshots as you like on the same flight, it will automatically store them.
http://perso.accelance.net/~pesoft/trm/us_trm.html

I used to use Grab Clip Save for screenies, you can map any key and select what you want to save screenies as (bmp's are usually too big, with GCS you coiuld save as jpg for example)

Now I just use IrfanView's screen capture option. I have a multimonitor setup and it seems to capture the main screen only, better. The program is good to batch re-name, re-size or sharpen pictures too.