I STRONGLY SUGGEST YOU JOIN A DCC DISCUSSION GROUP!
If you have not chosen a DCC system, go with the "DCC for Everyone" first.
The following are links to online DCC discussion groups. (Not in any order) These discussion groups provide both ideas and technical help for DCC users. The groups that are based on a specific DCC manufacture do not represent the company in any official way. However the depth of knowledge and fast response can get you going in the right direction.
DCC For Everyone: http://groups.yahoo.com/group/DCC4EVERYONE/
Wiring for DCC: http://groups.yahoo.com/group/WiringForDCC/
NCE Users: http://groups.yahoo.com/group/NCE-DCC/
Digitrax Users: http://groups.yahoo.com/group/Digitrax/
MRC Users: http://groups.yahoo.com/group/MRC-DCC/
Lenz Users: http://groups.yahoo.com/group/DigitalPlusbyLenz/
Atlas Signal Users: http://groups.yahoo.com/group/Atlassignal/
SoundTraxx Users: http://groups.yahoo.com/group/soundtraxx/
TCS Users: http://groups.yahoo.com/group/tcs-decoders/
QSI Users: http://groups.yahoo.com/group/QSIndustries/
Zimo Users: http://groups.yahoo.com/group/Zimo-DCC/
LokSound Users: http://groups.yahoo.com/group/loksound/
ESU Users: http://groups.yahoo.com/group/ESU_ECoS/
EasyDCC Users: http://groups.yahoo.com/group/easydcc/
MAC DCC Users: http://groups.yahoo.com/group/MAC_DCC
(Macintosh)
JMRI Users: http://groups.yahoo.com/group/jmriusers/