Hi! I've tried Image Grabber II, but it doesn't work properly on Windows 7. Besides, Media Player Classic Home Cinema doesn't have enough options for customizing screeengrabs. After some research, I found another free program called simply "Image Grabber", different to "Image Grabber II", which works perfectly on Windows 7. It has a very simple interface and it's really easy to use. You can download it
here (no password required). The zip file also includes the FFDShow decoder, which allegedly allows the program to work with more video formats. Anyway, the FFDShow decoder is an always welcome improvement for multimedia playback. You can download the latest version
here.
Here are the settings that, in my opinion (after many tests), work best to take the most advantage of the screen with a 1600 x 1200 resolution (4:3 aspect ratio):
And here's an example after running the program with those settings:
My apologies if this has been posted before (I didn't find it). This is a great solution for Windows 7 users that want to create screen caps with plenty of customization options. Thnaks for reading!