I'll post my updates within this thread as I make them available. Detailed install pix are forthcoming.
Special thanks to Lee Hicks (NSX Jr) for his advice and consultation regarding the SAT install, climate control faceplate and overall Audi electronics knowledge. He certainly trumps me in a lot of areas. Thanks Lee!!
1) RNS-E installed and fully functional. Check!! (Gee...that was easy!)
2) Climate control faceplate from 2002+ A6 to match color of RNS-E. Check!!!
3) OEM Sirius tuner installed...and fully functional. Check!!! (still have to call Sirius and finalize the subscription price. However, I get about 20 stations for free as is...so I've been "milking" those for the past two weeks)
4) Custom Phatbox and SAT tuner cable (so I can run both at once)...installed and fully functional. Check!!!! (This is a very easy cable to build..and will only cost you about $50 in parts from crutchfield and audi parts dept) - (Thanks to Todd1010 for his help here. You rock!!)
5) Dietz 1417 A/V interface for Blaupunkt ME3 (DVD player and TV tuner). Check!!! (I still need to power up my aftermarket amplified TV antenna and custom video-in-motion switch - all minor stuff; Can you guess where my switch will go??)