i got photoshop, but i'll find my way

if you have the time to make a tutorial with pics, it would be much appreciated.
I dont know if im going to far now, but could it be that you could also mention how to make both crosshairs (the normal one you have when carrying a SMG) and a sniper scope? (i personally am more in need of a "normal" crosshair, not the sniper scope)
thanks for making a basic tutorial