Using an application such as PhotoShop, the following will use a custom color palette:
1) In PhotoShop - Choose Save As A PICT -Indexed Color - 8 Bit.
2) Go into Movie Converter and set the compression settings to video compression - high quality - 1 frame per second.
3) Convert the PICT into a Movie
You will have a movie that has the color palette you need. You can then paste that movie into any where else you want to use it.