Take a look at the attachment to this post...
http://benboxlaser.us/index.php/topic,1392.msg16807.html#msg16807#2 is a little more tricky as you can actually load the laser control screen without the main design window being open (it's a command line switch), also you can see the feed rates in the g-code. I added it to the overlay, which may help.
#3 is also added and seems to work OK.
Black is 100% feed rate.
Red is 80% feed rate.
Magenta or Orange are 60% feed rate.
Blue is 40% feed rate.
Green is 20% feed rate.
Yellow is RAPID feed rate.
So if you have rapid at 2000 and regular feed at 200, you would get:
Black 200
Red 160
Orange 120
Blue 80
Green 40
Yellow 2000
I wasn't sure how to handle yellow as the power percentages are based on min and max, so yellow is laser minimum but that doesn't apply here. I considered using the same method but that is likely to cause problems as the default would be rapid feed rate so this is what I came up with - feel free to tell me I'm wrong and offer a better solution.