Rick...it sounds like the problem is that you have ONE speaker mounted in the bedroom...and one in the living room and TWO outside. So the real problem is that you don't have a pair of stereo speakers in the bedroom...OR a pair of stereo speakers in the living room.
Your Jensen is capable of ONLY powering 4 total speakers at a time. So this was not an error ...but a choice on the part of the mfr. since most people don't care about stereo from ceiling speakers. My suggestion if you want stereo in the bedroom is to remove the living room speaker and extend the 2 wires attached to it with a couple of butt connectors into the bedroom where you can mount the speaker you just removed and reconnect. You can buy a grill cover for the hole in the living room ceiling!
If you want stereo in BOTH rooms...you'll need to visit a car stereo shop (or all Crutchfield.com) to get a small 4 channel amp with high level inputs OR use what is called a line level converter. This would allow you to power the outside speakers from the radio and the 2 pairs of indoor speakers from the amplifier.
For the record...any wires coming from the back of your radio that have ANY Gray or White color in them are for speaker A switch on your radio gray for right...white for left. The purple and green based wiring is for speakers on B with left & right again respectively. All other wires are power or clock or grounding wires and should not be messed with.
If you attempt any of this yourself...be sure the radio remains OFF until ALL speakers are connected or you can blow an output stage which is neither fun nor cheap!
Hope this helps a bit.
If it were me...I'd try the bedroom move with the living room speaker...but get a nice table radio/boombox for the "lounge" as a simpler solution. A small inverter could let you run one off of 12V cheaply. Check out Cambridge Soundworks, Tivoli Audio and CCrane for some ideas. good luck!