My *** god. I can't stop playing Alpha 2.0!!!! This is ridic! I wish I knew had to do SSs. Print Screen looks bleh using wordpad and idk if its just that I'm not using photoshop or w/e (I don't have a good paint program)
Are your screenshots being taken as jpgs? If so, and if the game supports it, add a command line argument to the end of the target line to change it to bmp. I know nothing of xiv alpha so this might not work.
Example:
"D:\Program Files (x86)\Guild Wars 2\Gw2.exe"
into
"D:\Program Files (x86)\Guild Wars 2\Gw2.exe" -bmp
Edit~
Or just get FRAPS as Dread said.