Bit of a green footprint I think using the barbeque, the cost of charcoal would be more than buying ready to use compost.
Be patient, you have to, to be to be a gardener, or try the other persons suggestion of marrows or suchlike on top of the heap. When we visited Great Dixter they had a huge heap, and I mean tractor loads, rotting down and covered in if I remember right melons. If it was good enough for Christopher Lloyd then I am sure it will do for you 8)
Ivor