Adding those things will likely require some additional harness. Based on what I recall:
1. Sir Sam has or had several EVIC assemblies and has some experience getting them working but IIRC getting the right EVIC assembly for a specific CRD is a bit of a problem.
2. adding steering wheel controls for the radio is not too difficult. See
viewtopic.php?t=26531 for what's needed and how too. If you have a factory radio that accepts input from those controls it should work fine. If you have or plan to use an after market radio with steering wheel controls check Crutchfield for the Axxess (
http://www.crutchfield.com/S-ex2zRctDzK ... -ASWC.html) interface which works much better than the PAC one. The Axxess install instructions are or were a bit funky so if you go that route and want to see my update to their instructions just drop me an email.