A pillars are easy just pull very hard and try not to break the clips (shouldnt though)
B pillars you need to take take the back quater trims off undo the 2 screws behind them, and pull or slide down slide down leave the clips in but doesnt break the pillar. Also to get the seatbelt out of the pillar, I pulled the bottom trim off and undid the bar holding the end of the belt slipped it off and fed it through the b pillar.
C pillars are probably the hardest there is a screw underneith the middle pillar (that just pulls off) then there are 2 screws behind the back plastic the part that holds the seat belt, these need screws undoing to come off as well. Its straight forward and easy enough to do though so you shouldnt have a
problem though mate.