I suggest you take at least two recent passport size photos. And the original and copies of your Rent / Lease Agreement.
Remember don't leave the Original of your Embassy Income Affidavit at the Penang Consulate - you have to have to apply for the one year Extension of Stay.
Here is the link to the Penang Consulate website... I find it a bit confusing as under Category O the reason for applying for it as a first step in an Extension of Stay for being age 50 or over - Retirement is not listed. Also some where on this site should be a downloadable Visa Application Form with the Penang Consulate name on the top. I will keep looking