http://www.alienbees.com/cybersync.html#csrb the above link shows photos of the CST installed on a camera's hotshoe. The second photo shows how an AC powered receiver is connected to a light. If you go with the CC and + recievers, we reccomend also having a CST. You will get a longer range, but primarily, since the CyberCommander is also a light meter, and keeping a CST on camera provides an easier work flow, reducing the need to remove and replace the CC in the hotshoe.
The modifiers you should get will be based on the look you want out of your pictures. There is no law saying you can't have umbrellas and softboxes. Customer service can assist you in your selection of modifiers.
TS