Ipcc exam tips

hey.. i need ur help..i m giving my first attempt of ipcc group 1 in dis nov...so my questn is dat study material nd pratice manual questions is enuf for cracking ipcc in first attempt????? i herad dis alot dats y asking all dis...althoght i hve done othr publishrs book also -for tax girish sir,- for cost, fm r.k mehta sir -for law munish bhandari nd -fr a/c done with praveen sir...........................but now on this stage means jst before 2 months from exam..im confused dat eithr i shud go for othr publishrs buk question which i have one done once...n will do again....or i shud refer study material nd practice manual question...i have also seen dat some of the questions of material nd Practice Manual are very different as other publishrs buk............need ur help...plz make my doubt clear..