Front Speakers
The front speaker panels have two or three locking pins in them...
Turn them 90 degrees, get your fingers under the bottom of the plastic and pull it outwards - the front edge of the plastic is hooked under the edge of the door seal. Once the front edge of it pops out, pull it towards the back of the car and it pops out the hooks at the front. The drivers side has two locking pins and you have to remove the bonnet lever to get the panel out, the passenger side just has three locking pins.
The speakers are screwed into the back of the kick panels, you'll need a small torx driver.