Ca final dt preparation - using only institute module?

Hi All:

i am appearing for CA final Nov'13 GroupII, I want to check with you, if it is best try that i ONLY use only ICAI Direct taxes module for Nov'13 exam + amendments+cases laws than Vinod gupta modules or Manoharan book for NOv'13 exam and still i can score 60 marks.

when i want to start vinod gupta modules, i am concerned form time perspective for Nov'13  that i need to covered approximately 7 modules of ~2000 pages in a short time.

Hence, is it a right approach to depend entirely on insititute module and material for CA final direct taxes?

Please let me know your experiences.

thanks in advance.

REgards

srinivas