1.  Which DCC decoders work with Ahearn diesel locomotives?    I have several that I want to convert to DCC compatibility.

2.  Are there any DCC decoders that can be installed in Ahearn diesel locomotives that do not involve soldering?

3.  Is this something that I can do myself or should I have it done by the local hobby shop service department?

I am fixing to build a new RR layout (which will cover two 4'x8') particle board tops.  I have generally decided on the track design and it will feature several switches between tracks (probably 10-14).  The locomotives (all diesel) are DCC-compatible.  I plan to run anywhere between 2-4 trains at the same time.

Question #1:  Are there any simple and decent publications on how to install RR switches?  Do they need to be powered from a seperate power source?  How do I control them?

(Note: If and when you respond, assume that I am a total rookie and tell me what I need).

Question #2:  Do RR switches work with DCC?  If they do work with DCC, how do they work and how do you make the connections?

I am in need of some help from someone who knows what they are doing.  Thank you.