a- Why has it snapped?
b - Is it a common thing?
c - Do I need axle stands to do the job?
d - Do I need to take the engine out?
e - Do I need new oil when doing this job?
What oil do you recommend?
f - Do I need to have my bottom end r-skimmed due to cambelt failure?
g - Whats the best cambelt to get and how much are they?

a because you were to tight to replace it
b yes with tightarses
c couple of bricks will do
d if you want
e re use the old oil
f only if you crapped your pants
g a pair of old tights will do

hope that was some help oddy