Make or find a woodgrain pattern you like. You may use this one here:
Open this woodgrain sample in your PSP.
Open image you want framed.
Add border using any color as background color.
Use any size border you like; I like to use '10' symmetric.
Select border with magic wand.
Using paint can option with Texture 'Pattern',
select the woodgrain sample for your pattern.
Fill the selected border with the woodgrain pattern.
With border still selected, add drop shadow.
Color black, opacity 101, blur 20, V2 H2.
Drop shadow again with same settings except H-2 V-2.
Buttonize or use your plugin button maker.
Deselect border and you've got a wood framed image.
Play around with the different settings til you
get the effect you want.
If for some reason, this tutorial doesn't work,
please let me know.
I have tried hard to write down each step but may have
missed something. Thank you.