try this little program...
http://tinygrab.comyou sign up for a free acct.. install the program.. put your acct info into it..
then use CTRL+SHIFT+4 and then click+drag the mouse to draw a rectangle around what you want to screencapture...
it will automatically save the picture, AND upload it to the tinygrab site, AND copy a link to the clipboard...
only downside... you have to link as URL, not as IMG
http://grab.by/bPr6though if you know what you're doing you can go to the link and pull the direct image link from the page source