BIG CO2 cylinders

Hey all!
Owing to the close of my local HBS I have negotiated a pub gas cylinder to replace my now empty standard issue one, more 'cause it'll look cool than anything else! Is it possible to connect it to a standard home brew keg? and if so what do i need? I got as far as knowing I need a regulator before my googling just got me confused! The pub cylinder has a 15mm diameter screw fitting methinks and my keg has a standard issue Hambleton bard valve. I may just be being silly but its quite a drive to buy new home brew CO2 now.
Many thanks in advance!

I would think that the connection at the CO2 cylinder is 'standard'. you just need to run a gas line from the regulator that has the correct disconnect for your keg...assuming that is the same in the US its a ball lock or pin-lock connection.

Many thanks, will post if there are any humorous explosions.