I'm trying to follow some psp tutorials, and I'm getting this alot:

Fill your image with Sunburst Gradient Fill

What exactly is Sunburst Gradient? I look under the options for tools but it just shows [check attachment].
And it asks for settings like:

Settings:
Fill Style = Sunburst Gradient
Blend Mode = Normal
Paper Texture = None
Match Mode = None

Which as you can see don't exist under my flood fill options @_@

EDIT: Attachment didn't work >=|

EDIT No.2: 'lo behold