Currently there is an 'advance status' offer on bmi where you start on sliver and retain it for 12 months if you earn 4000 status miles in the first 3 months:

http://www.flybmi.com/bmi/en-gb/diam...embership.aspx

On the pattern you say you would earn 15+12+12k (as your bmi year would include your return flight from NZ in Jan 2011) which would be enough to qualify for *G with bmi on their own without taking into consideration your Europe flights, presuming all are mile-earning with bmi.