This is one of the basic problems with the SCP. It's made FREDders lazy

When we only had retail to work with everyone came up with fantastically innovative methods to do things using what we had at hand. Now everyone asks the SCP if they can do something and if they can't they throw their hands up in the air and give up on the idea.

There is nothing in that post that I couldn't do right now with FRED, pof and table edits. It wouldn't be anywhere as neat as if the SCP coded it by a long way and it would be very annoying if you wanted to do it a lot but if you only wanted to do it once or twice in a campaign there is nothing there that you couldn't already do.
I'm not saying that what you propose is a bad idea. I'm not saying that the SCP shouldn't do it either but I do take exception to people saying that something can't be done when in fact it can.
If you really want to know how to do it I'll tell you but right now I can't be bothered to type out a long explaination for something you probably wouldn't want to use anyway.