gxpintn

I got this for the dash and two sets of these for the door and rear deck. I didn't feel like paying a premium for 6x9's. I'm gonna mount the rear tweets up high on the rear pillar, probably gonna tap everything into the existing wire instead of using their crossovers unless I see a direct benefit to theirs. I have a few questions...

1) Before I go tearing anything up how do I go about getting the dash grille off and the door panels? The doors look like a pain in the ***.

2) Am I gonna see any type of funny business with dropping the impedance load of the speakers? Delcos are typically 8 ohm, these kickers are 4. If they are gonna burn up the oem amp I'll just wait until when (if) i have the money to tear out the factory amp. I wouldn't think there would be a problem but this is the first car I've installed speakers in that's had "premium" sound.

Any other caveats or warnings before I do this on Saturday would be most appreciated. Thanks guys