Great that i found some time to make something for DA .. ( still busy with one project)
Example of making cloth for your interfaces or web layouts...
I know maybe it sucks but i hope you will find something interesting
1.Basic form using marque tool (for example)
2.Draw a pattern using pencil tool
3.Using any grunge brushes (and eraser) make your pattern look grunjie (lol my english sux)
4.Group all and make the form like in pikture using warp tool .
5.Apply silk texture and some pattern to your cloth.
6.Add some dirt with grunge brushes (black and white).
7.make the cloth look crappy (i am first time using liquify filter for doing that so it might suck..
8.Add more shadows and some dirt.
9.Finish with colours shadows and apply logo.
10.Finishing touches with shadows, colours and logo.
I am not explaining all the details (maybe this example is not for begginers ) but i will answer all yours questions in comments
Sorry for my english