This Instructable is for changing someones hair colour in Photoshop. Im not exactly sure if this will work in Paint Shop Pro but you can always try.
Step 1: Choosing your Photo
This is just a picture off the internet that i used.
When choosing a photo you must remember two things.
1: Pick a picture with the least amount stray hairs. The picture i picked does have stray hairs, but there close to her head so it doesn't matter as much.
2: The other thing you should keep in mind is to pick someone that has light hair ex.blonde. I think darker hair will work but not as good.
Step 2: Masking
The first thing your going to wanna do is Mask out the hair. Masking is simply a way of selecting things.
To do this select the brush tool then press "Q" on your keyboard.
It doesn't have to be exact but you should try to be close.
Step 3: Making the selection
After you have all of the hair masked out press the "Q" key again. After you press the "Q" key press control-shift-"I", or Inverse. The picture will look the the one below if done correctly.
When you've completed the steps above, without deselecting make a new layer ontop of the background layer. Click on that layer.
Step 4: Colour
Once you've selected the new layer go to your colour selection on the left and choose a colour, I went with a dark red. Now choose the paint bucket and fill the selection.
It should now look like the picture below.
Step 5: Blending
Go to your layer menu and click on the overlay pull-down menu as shown in the picture. Choose "Soft Light" as shown.
After you picked "Soft Light" press "control" "d" on your keyboard to deselect the selection.
Step 6: Erasing
Once the hair is the colour you want make should your on the colour layer and pick the eraser tool. Get a feathered brush from the brush types menu. Then you just going to want to clean the picture up by erasing the colour that is not on the hair.