Time @ one and half months
@ Books - SCEA Osbourne Pub, Head First EJB, SCWCD Manning Pub.
@ Practice Exams - Exforsys, Osborne, Sun ePractice, moelholm practice tests
After having taken the exam I recommend - Moelholm tests, Sun ePractice tests
You can score about 40% if you go through SCEA Osbourne Pub and for the rest you are on your own.
This can be of some help - http://www.sweber.be/SCEA/