Read Imad's article, quite a learned fellow.
http://www.accountancy.com.pk/articles.asp?id=183
Very good article... A Must read.
http://www.accountancy.com.pk/articles.asp?id=178
@s55, I spent around 6 months on an AAP at Meezan Bank. Spent quite a few evenings with Dr. Imran s/o Mufti Taqi the shariah consultant of Meezan Bank.