trying to recreate an effect

[nathmatt]

ok so i made a window looking overlay but i cant remember how i made it so was hoping some of you graphic geniuses could help me replicated it in photoshop if you can just make it a style here is the image

[stripe103]

to me it seems like a blurred square with a blurred line through it. shouldn't be to hard to make.
though I'm not too good with PhotoShop.

EDIT: Okay so I was wrong. It isn't that easy, not to me anyway. I tried with Gimp but I can't get the right kind of blur.

[Valdred]

Double click the layer to bring up styles. Check "Bevel & Emboss" and modify it to your liking