Well...that depends on your capabilities.If you are above average and u work hard,it is possible.You need to read atleast 12-14hrs a day.If u are going to write in May 2012, you have sufficient amount of time and don't waste a single day.
As per my opinion these are the best books for IPCC
Accounts(GR 1 and 2):PC Tulsian's Accounting for IPCC(vol1 & 2)(S.Chand
Laws,ethics and comm:Munish Bhandari(Bestword's)
Costing and FM:Padhuka's
Taxation:VK Singhania(Taxmann)
Auditing:Surbhi Bansal(Bestword's)
IT and SM:Padhuka's
Accounting Standards:DS Rawat(Taxmann)
Auditing Standards:DS Rawat(Taxmann)
Also refer Suggested answers,RTPs and CA student journals published by ICAI.
One advice is not only just read theory and solve problems but also analyse them to depth.This will be very useful as our exam papers are quite unpredictable.
All the Best!!