I don't exactly know how to on Paint shop, but here's how you do it on photoshop; I assume it's the same.
Step 1:
Get a picture you want to split the background from.
Step 2:
Select the wand tool
3:
Select an area that you want to be removed.
4:
Press 'delete' to get rid of that area. (Note - the checks mean a transparent area)
5:
Repeat until done.
6:
Make a background for the sig (It doesn't have to be made by you, though)
7:
Drag or copy/paste minifig onto the sig.
8:
Notice how your minifig is a bit big? resize it so it fits.
9:
Add words.
---
Is that what you wanted?
You choose how to repay me, as it is free.
