for the code list, go here-
http://www.4thgenerationcivic.com/ - and click on "F.A.Q.&ECU Codes" on the lefthand column (fourth button down)
sounds like a fuel issue. r u saying that it has a problem starting when the engine is already warmed up? if so, then it's mostlikely that the fuel rail and the fuel lines near the engine r getting hot and the fuel is vaporizing in the lines. it could also be conbined w/ a bad check valve in the fuel pump, and when the fuel boils in the lines up front, it pushes sum of the liquid fuel back into the tank thru the pump. that's y when u let the fuel pump prime for a while it will start, because it's gettin fuel back in the lines and pressurizing the system again.
now about not starting it for a few days, i can tell u exactly how to check for a parasitic drain on the battery. u'll need u'r multimeter to do it tho. just take the negative battery cable off the battery. set the meter to read amps. make a jumper wire w/ a 10amp fuse in it. put one end of the jumper wire on the red lead on the multimeter, and the other end on the negative battery cable. place the black lead on the negative terminal on the battery and check the amperage draw. this is all done with the car off completely. u shouldn't get a readying higher than 0.060 amps. if u do then u have a parasitic drain wum where. i bought my last crx w/ a drain bad enough that the car had to be jumped every morning. turned out the guy had a stereo system in there that he had taken out, and had left a powered crossover inthere still kind-of hooked up. it was the cause of the drain and when i removed it, not a single time have i needed to jump the car. so if u have an amp or anything powered that u or sumone added or removed recently before u'r drain problem, double check to make sure that wasn't the cause.
edit: had a couple of "mis-speaks"