I think its actually posible... you can do everything you want in a computer, you just have to know how ^^
but an easy way "to make a crosshair that goes over all programs like your fps and stays there like not hooking on the game or anythinge just sitting there like in the pic" is:
go for some tape and make a crosshair in you monitor... I think it'll work ^^
of course, make the two tapes (or whatever you use) cross exactly in the center of the screen