I can describe it briefly for you ..I am goint to be away for four days - leaving Thursday - so if you have any questions I wont reply til Monday.
The first overlay in teh freebie kit was just made using the art brushes in DIp so Effects> Paintbrush> ArtStroke. Basically just vary the type of stroke, direction, size and transparency to create the look you want. This is one case where a tutorial really wouldnt help ..its just about playing and seeing what you come up with.
The second layout uses the files i offered for download some time ago with different textures re this thread:
How do you create scratched backgrounds?? that you actually started lol. Basically I used a combination of the textures I made and the art brush - using transparency gradual options, and the transparency brush to get the effect I was after. Again its really just an intuitive thing - playing til you get what you want.
Sorry I can't be more specific but have a play and see what you come up with
And thanks ..my kids are cute

LOL