You can use VMKPal to take a picture and easily crop/save it to a file.
Or you can simply go and hit the Print Scrn/SysRq button above your arrow keys on your keyboard, and then go into Paint and hit Edit Paste. And then crop the picture and save it. Then to upload it use the Uploading bar under "edit signature" on micechat.
After that, go to my images on imageshack. See where it says browse? click on that, and it will bring up your documents. Find your saved picture, and double click on it. Now click on Upload.
You will see something like this below (Your pic), with a bunch of codes. Click on the text under embeddable code, for forums (That's the top one). It willl highlight the text. Right click the highlighted text and click copy.
9. Go to micechat.com. If you want to put the photo in your signature, click User CP at the top. On the left, click on edit signature. Paste the code in there. Click save signature. Boom, there's your picture.
If you want to put the pic in a post, do the same thing only don't go to user cp. just do your post like you normally would, and then paste the code in.