<font color="blue"> just always gave those side panels a very quick, hard jerk and they came off </font>
I do the same thing, but one thing I learned is to wear gloves. The panels release...uh, quickly /forums/images/graemlins/tongue.gif, and I've banged my knuckles up on the FEL arms pretty good in the past. Screwdriver might be a better way to go...
As far as the leaking oil filter, there are a number of things that might cause that. The old filter gasket might have been stuck to the engine and left on - two gaskets are not better than one. The new filter gasket might not have been lubed up before attaching, so there wasn't a good seal. Or it might not have been tightened up enough, and come loose, as mentioned. That would be the easiest fix (just crank it down *by hand* real good and you're set). The other options will require that you remove the filter, and before you do that I highly recommend you drain the oil /forums/images/graemlins/grin.gif. No big deal, I would expect, but an obnoxious hassle since it sounds like you paid someone to do the job right in the first place.