1. Copy and paste the brush set into PSP.

2. Click on the Selection Tool and make a selection around the brush you like.

3. Click on the brush tool, then click on Create Brush Tip from Selection.
4. Name the brush and click OK.
OR.. Paste the brush set into PSP, make a selection around the brush you like, click on the paint brush, click on the little paint brush icon on the side, click Custom, and click Create.