Use a preset pattern from the PostScript Patterns folder
Each preset file in the PostScript Patterns
folder contains a single pattern in the Adobe Illustrator format.
You can scale these patterns at any resolution.
Choose
File > Open.
Navigate to Photoshop Elements 6.0/Presets/Patterns/PostScript
Patterns.
Select the pattern file you want to use, and click Open.
When the Rasterize Generic EPS dialog opens, click OK
to proceed.
Choose Select > All, or make a rectangular
selection around the pattern with Feather set to 0 pixels in the
options bar.
Choose Edit > Define Pattern From Selection.
The pattern is defined as an Adobe Photoshop Elements pattern.
Enter a name for the pattern in the Pattern Name dialog
box, and click OK.