http://img396.imageshack.**/img396/5418/grill68ej.gif
http://img396.imageshack.**/img396/2571/grill36ar.gif
http://img396.imageshack.**/img396/1631/grill19aq.gif
http://img396.imageshack.**/img396/9516/grill40rt.gif
http://img396.imageshack.**/img396/6605/grill78df.gif
If you don't know how to use just a single square and are used to using full mesh patterns and chopping down, do this:
First open these all in PS, and save them as pattern by going edit>define pattern, name em what you want.
Open a new document, relative to the size of mesh you need, with white as background. Select all and in edit, use fill. then just ctrl+a and ctrl+c and paste into you psd that you are working on, then follow the usual steps.