This set was made in PS5 (on a Mac), using basically Filters and Layer Modes. The specifics may not be available in other programs or versions of Photoshop, but the general method is available to anyone.
I'm not doing banners for this one, since unfortunately the winner of both icon and texture challenges was me (icon #5 and texture #1). I'll put tutorials up as soon as I have a chance.
I would like to invite both immortalje and wunderkind_lucy to put up a tutorial for either or both their texture sets, as I like to see how other people go about making these things.