Tacoma;

On the lower left corner of the Flight Engineer's panel is the radio controller (it's black).  You'll see a bunch of silver switches pointed up.  Look for the radio you want (NAV1, NAV2, ADF1, ADF2) and flip one or both of the switches for that radio down. You should then hear the identifier if you've tuned it properly and are in range.

As an aside, the other item on the FE panel you need to be familiar with is the fuel flow panel.  Since the center tank has more fuel in it, you want to draw from it first until its quantity is the same as the Right and Left wing tanks.  To do this, open all of the crossfeeds and turn the booster pumps OFF for the wing tanks but leave them ON for the center tank.  You should then see fuel only coming out of the center tank.  Once they are equal, either shutting the crossfeed valves or turning on the wing tank booster pumps will return you to "tank to engine" fuel flow. Long story short, once the wing tanks are dry engines 1 and 3 will flame out if you don't have the crossfeed set up.  Ask me how I know

More on the fuel issue (with a picture) here:
http://www.captainsim.org/yabb2/YaBB.pl?num=1247894913

Matt2218 wrote on Dec 16^th, 2009 at 3:42pm:
Thanks for that Matt.

Last night I was doing a flight from KSEA to KJFK and at about 150NM from KJFK my left and right fuel tanks ran out of fuel. All my engines flamed out (I encountered this the other day too and crashed). I was able to restart them, but not for long. Strangely enough, by turning on the APU I was able to get my engines restarted and to remain running AND I landed safely at KFJK. I don't know exactly what I did so please don't ask. It was just a lucky fluke. After being guided to that other post, I don't think I will have this happen again (fingers crossed).

As I said before. Thank you.  

Mark