Malaysia and Singapore does the same ATPL papers (basically the UK CAA ATPL exams - 14 papers, that even the UK pilots don't do anymore. They do the JAA ATPL now). So, yes you do not have to do the ATPL with SFC again. You've already passed them. Yes, you will have to do Airlaw in Singapore. Every country has different Airlaw papers.
Basically, Malaysian DCA CPL and Singapore CAAS CPL are mutually acceptable.
Good luck and all the best to you man! Let us know how you get on.
M DCA also one kind. Why they don't accept any other country's ME rating is beyond me. Its not like they have the world's foremost ME training.
Singapore001, are you Malaysian or Singaporean? Can you verify that you got a FAA CPL/IR, approached a Msian academy to convert to Msian CPL and wrote the ATPL papers with them, will finish ME and graduate with a Malaysian CPL ME/IR fATPL? Does this mean I can get my CASA CPL/IR, join MFA or KLIFA just to write my ATPL, complete ME rating with them and get DCA CPL ME/IR fATPL?