I have some pioneer speakers for my accord 2000 Accord LX and I would like to know how to open the door panel for the front speakers and also how to install the rear speakers. Any help will be appreciated thx.

 

If I remember right, the rear ones are directly accessible from the trunk.

For the front ones, remove the door panel. Pick up a Haynes manual or the Helms manual for instructions, they'll both show you which screws, where the clips are, and in what order to do things.

 

Front: screw in door handle and armrest pull handle, then clips all the way around.
Rear: IIRC, 2 screws for each grill from the trunk, then 4 screws from the top holding the speakers.