You don't have to explain step by step, you can just point me to where I can find this info in the Manual too : )

JDL

I believe the easiest way to create palettes is to create them in GIMP then copy the palette file (.gpl) to \inkscape\share\palettes\.

But the files are only text files so if you're patient you could write one yourself. Open one in a text editor to see how they are formated.