its not too hard at all.
follow the procedure on celicatech in the BGB on how to remove the fuel pump.
its under the back seats...there is an acsess panel, youll remove that, then disconnect the fuel lines.
MAKE SURE YOU USE FLARE WRENCHS. trust me, you DO NOT want to strip that connection.
take off the cover and pull the pump assy. then swap out the pump.