CA after bcom h

Presently i am doing Bcom(h) from hansraj college, DU.. i got  77% in first year... and i am   expecting 80+ in second year... i gave cpt in june... Now i want to give both the groups in nov 2012 after my third year.. i will  left with around 5 months after my final exam of bcom (h).. now i am confused... Shd i give both the groups together??/ should i start coachings from now??? can i manage it after my final exam only???? or shhd i give group one group at a time????