I'm afraid there are no 'easy' ways to do this as it is a strip down procedure. But having said that, head gasket replacements are not impossiblycomplicated as long as you have a bible (haynes manual) and a sound mechanical knowledge.
good luck!
Be very carefull when attempting this job because if my memory serves me correctly from my days as a Peugeot master tech at was rarely just a headgasket the head used to crack in the inlet ports. The cyl head is more or less scrap if this is the case