Hi There;
First spred your ballast & then use a small brush to even it out. Spray with a mix of water with a couple of drops of dish detergent mixed in. don't spray directly on the ballast let the spray fall like a mist on the track. The mix up a 50/50 mix of white glue & water & use an eye dropper to apply the water/glue mix to hold everything in place. Instead of an eyedropper I use a syringe like you use for giving medicine, Hope this helps.
Tom
Andy Sperandeo MODEL RAILROADER Magazine
If you can get back into the old forum archive do a search with "ballast" and you will find tons of ideas... then you copuld post and tell us how on earth to get back to that stuff PLEASE!
There's also tons of stuff I've posted on ballast...
Have a nice day