Color Fill

I have had Corel Paint Shop Pro Photo XI for quite some time now but have only used it sparingly using it to retouch photos. I am now trying to make some new Icons for my PPC phone and am trying to change the background color from white to black. I have used the flood fill option with marginal success, it leaving white pixels behind and so close to the image that I'm having a hard time taking them out using the airbrush feature. If I remember correctly I stumbled across a way to lift the image paint the background and than put the image back. But for the life of me I can't remember what it was I did.If anyone could possibly help with this it would be greatly appreciated .....thanx in advance.

Hello,
- Select the image subject with the Selection tool
- Pull down "Selection > Promote Selection to Layer"
- In the Layers palette, select the Background layer
- In the Materials palette, make background color black
- Press [Ctrl+A] keys to select all
- Press [Delete] key