Have you ever hear of Mauritius? It's a beautiful island east of Africa, and I hear they have some good surfing there :) This week I received an email from Said, who is from Mauritius. He requested a denim texture. So here you go, Said!
In Adobe Illustrator, place the bitmap tiff on top of your graphic. Bitmap tiffs have transparent backgrounds when placed into Illustrator documents. You can assign it any color, just as if it were a vector object.
In Photoshop, I recommend using the Photoshop brush to add distress. Just double click on the .abr file and it will load into your brushes palette. Then just use it to paint texture right into your graphic.
If you are using a new version of Photoshop, use the high resolution brush. If you are using an older version of Photoshop you may need to use the lower resolution brush.