The G-HOOT scheme looks like a a seriously cool Eurocopter paint that has a multicoloured pigment and a pyramid type inclusion. The result is that it changes colour depending from which direction you view it. So, for instance it looks metallic green when it approaches and metallic red once it has passed.
I know it is not your chosen make but Eurocopter have a neat interactive site for their EC 120 so you can try different paint schemes.
Can't seem to get this into HTML but you can cut and paste.
http://www.eurocopter.com/ec120/fpaint.html
Otherwise take a line drawing of your machine into a hot bar on ladies night, go up to a group of wicked looking women that look like they are in advertising, tell them you want a scheme for YOUR helicopter and ask their advice. You will get a superb design and get laid too.