Hello ... please help!

As a very keen flightsimmer since 1997 I have always wanted
to try my talents at repainting aircraft so yesterday I went
and purchased Paint Shop Pro 7. I have read the FAQ and
downloaded the repaint instructions. Over the last 2 days I
have managed to repaint the Araine Air Studios British Midland
Star Alliance 737-300 into bmibaby colours and it looks great.
However, I cannot understand how to create night textures. The
downloaded guide doesn't really help because it tells you to
download a couple of files but they no longer exist. Basically
my situation is that I have a perfectly painted aircraft in
daylight but need to know how to create the night textures.

Please help!!!!

Ross