Another background tutorial ;-) And for this one
you are going to need:

20/20
FM Tile Tools - Collage Linear

For this tutorial I have used this picture:

Open this picture in PSP and go to effects, plug-in filters,
fm tiletools, collage linear and use these settings:

Your picture should look something like this:

Save this picture. Open in 20/20, go to image,
tile effect and your background is finished :-)