Spaghetti noodle wiring!!
The first problem is the obvious one: You don't know which wire goes where. But there's a second problem even more insidious: You don't know if some or all of the speakers are daisy-chained or paralled together!
My first question is: Are the wires different colors, or are they all the same type?
My second question is: Are the wires polarized, such that half of them are marked as negative, and the other half are not?
No matter what your answers are, you need a volt-meter to measure the resistance between wires. If you don't already own one, you can buy a cheapie at Radio Shack for about $20.
If each speaker is wired separately: You can connect one lead of the voltmeter to a single wire, then alternately connect the other lead to each wire in the bundle until you find the match. Each pair should read between 6 and 8 ohms. Once you have all the wires marked as pairs, you can hook up music to each one and walk around to find out which room is which wire pair.
If the speakers are wired in parallel: You'll see the resistance drop well below 8 or 6 ohms, and possibly lower than 4 ohms. This is a difficult load for most receivers to drive, and will require some work before you hook up and possibly fry your receiver.
If the speakers are wired in series: You'll see a very high resistance, 16 ohms or more. It will work, but you won't get much volume when you hook up your receiver.
Now before anybody comes in with the comment that a speaker's nominal impedance isn't necessarily the same as its DC resistance that the volt-meter measures, I say I have yet to measure a speaker that deviates at DC by more than an ohm or two from it's nominal rating, ESPECIALLY when we're talking individual wall and ceiling speakers with no crossovers. So there.
Good luck with the next of wires, and let us know how it turns out or if you need to get down and dirty.
