Larry, sorry about the Zephyr, but all electronics are subject to failure, especially in the first 10 or 20 hours of use. Digitrax makes a good product and they'll get you out a new one.
In terms of track weathering, are you saying that you are laying down ballast loose and not gluing it down? If so, that's really a mistake, since it will continue to shift around, get in your engines, and just not look good. You can secure ballast with a 50/50 mixture of white glue and water with a little isopropyl alcohol added. Spray down the ballast good with a regular spray bottle with 90% water, 10% alcohol, and few drops of liquid dish washing soap. That will help the glue mixture penetrate evenly. Use an eye dropper to apply the glue mixture once you have the ballast looking the way you want it. You can always remove a track by just doing the reverse, spraying the roadbed down well with the water/alcohol mixture. It will dissolve the glue and allow you to remove track with minimal effort.
Before you start ballasting, I'd spray the tracks with some Floquil Rail Brown from a spray can, since you don't have an airbrush. Don't worry about getting it on the ties since it will all blend together once you've finished ballasting and weathering. Just use a rag to wipe the paint off the tops of the rails before the paint dries and don't spray switches at all. You need to do these by hand so you don't gum up the works.
This is where Floquil paint pens come in handy. You can use Rail Brown and rust to paint the web surfaces of the tracks. You should do switches with just the paint pens but you can go back and touch up the rail webs with the paint pens after doing a general spray job. If you really want the track to look good, use some weathered black and mud pens and color random ties with each color. This will give the illusion of a roadbed with some newer ties (black from the creosote) and older ties, that have taken on a muddy color from being in the weather so long.
Once you have the tracks painted, the ballast glued and dried in place, and have done your touch up work with paint pens, you can weather the center of the roadbed with chalks. You can get inexpensive artist's chalks at craft stores. Just scrape off some black, to represent oil stains, and a light brown, to represent mud, as you go around the tracks. Use your fingers to spread out the chalk and work it into the ballast. The chalk will stay put once its worked in.
None of this is difficult, just tedious. However, if you do all this to your tracks before you go any further, you'll have a much more realistic layout when you're done. This is an example I did using Bachmann E-Z track and I think you'll agree it looks a lot better than it did when it came out of the box.
