This is a painful process that I need to go through every 5 years.
But I must say the standard of service from the Malaysia High Commision in Singapore has greatly improved. I reached there at about 7.45 AM. The forms were submitted at about 9 AM. I was allowed to come back in the afternoon to collect the passport. The collection is done within 0.5 hour.
One thing to note is that, they requested for Singapore address to be filled in the application form, also a photo copy of the Singapore blue IC.