Well flyingchinaman, I don't like to be the bearer of bad news.......... but DCA Malaysia has implemented the ATPL Theory requirement since 1996.
What it means is that you need to pass your ATPL subjects (UK CAA) papers to qualify in flying operations here.I don't know the priviliges of the CPL/ME/IR in Malaysia currently, but rest assured it will be very limiting.
Another point you have to brace for is that you might be required by DCA Malaysia to sit for some papers (at their discretion) before you convert your Canadian CPL to a Malaysian one.They also might require you to undergo a flight test (again at their discretion)
The best course of action is to call DCA & meet up with the Licensing Department guys in Putrajaya.
My advice?Get your ATPL in UK........ it will cost a bomb but it will be well worth it!
BTW, welcome home!
PILOST