Open up a new image in PSP with a black background.
Click , then click your image and change your settings to mine (use any font):
Press the ‘Ctrl’ key (and hold), and ‘H’ (then let go of both). A box should pop up called ‘Feather Selection’. Change this to 10 if you’re using a big font, or leave it at 1 if you’re using a tiny font.
Open up an image with a white background, and copy and paste your text from the black (or whatever colour) background. Here’s mine: