Quality graphics?

IM havin some problems in photoshop 7. Im not a newb at it, but im not quite an intermediate to my standards. I never can create a graphic that really stands out color wise, like it has been glossed or something. A color that isnt solit, but is and looks like semi see through; it has depth. Such as on this site template in the top part where the flash is, in the orange :


I do not understand how to create color that would bring that effect.

If possible I would really appreciate it if someone could point me in a direction to achieve this effect for my work, or even send me some keywords to look for tutorials on goodle and learn. Please Help me out.