the only thing really wrong that i see with that disc is there is a guy doing something "unmentionable" to a furry farm animal!
but on the serious side, when you do multiple color dyes its always best to do the black first. you do the black first because every other color will not effect the black on the disc( well it might make it darker, but you want it dark right?) you dont have to cover up black when you dye any other colors on the disc. that will make it a bit quicker in the long run. and you dont have to worry about lining up the colors perfectly that are going next to the black.
in my opinion Champion or Z plastic is the best to dye because it holds the image longer before your lines start to get fuzzy. and no matter what you do, every dye will get fuzzy with time. pro plastic is pretty bad for that. i also have found that the red dye that i use sets in much quicker than my black or other colors do. i dont know why becuase i am not a chemist, i just know it does. for the best black make sure to have your dye at a good temperature. i know that ChUck has posted some actuall temperatures on this thread, maybe go back and look for those.
for me i just start dyeing when the dye is steaming nicely. one more tip since you are just starting to dye, be VERY careful with your dye! if you spill it on something, most likely that something will be dyed forever.
hope that helps some.