2. You decide the portion during nomination, similar to epf. Generally, if nothing is mentioned, is deemed equal share ... same with property joint ownership.

3. Dont complicate matters for the living. Change the will and or nomination. The dead is gone, the living can go to court for an interpretation no matter which is right. Dont have to shed tears in grave.

4. That is the purpose of the trustee, to manage for the purpose specified.

1. No. You will have to fill up the form either with your servicing agent, or you can go to any of the servicing branches to do so.

2. This is up to you to decide. Let's say your sum assured is "x". Then you can write down the details of each of your nominees, and put down whatever percentage (up to 100%) you'd like them to receive respectively. There's no formula. If you just want to show exactly how much you hate one of them, just give the person 1% and the other person 99%, also can. It is entirely up to you.

3. Insurance nomination takes precedence. Insurance nominations need not be included in the will. (Sorry, but it does sound like you're making it difficult for yourself).

4. Trustee is very different from nominee/beneficiary. A nominee/beneficiary receives the monies as their monies. How a nominee/beneficiary utilizes the insurance proceeds is entirely up to them. On the flip side, a trustee is holding the monies in trust. Which goes on to mean that the monies do not belong to the trustee, and the trustee is merely holding it on behalf of the actual beneficiaries. The trustee can only utilize the monies for the benefit of the beneficiaries.
The topic is actually very straight forward. Don't complicate it ya 

Open up the loan offer letter and it will be able to tell you if there was any MRTA or not.

Good question.

Death Claim Form - Claimant's Statement
Original copy of Letter of Authorisation/Consent
Death Certificate duly certified
Claimant's NRIC duly certified
Deceased's NRIC duly certified
Death Claim Doctor's Statement
Detailed Post Mortem Report duly certified
Direct Credit Form

It's call investment linked. You can take out some money but it will affect your insurance sustainability. If it is pure life, should be no issue. If it's medical yes, will have issue (cannot sustain until the age you want).

Those that diagnosed with certain disease is call critical illness. To know what critical illness are eligible, read the PDF file by the insurance company. If your condition does not fulfilled their definition, sorry no payout even though eg if it's a heart attack.

Personally, I feel that CI is only 3rd important and even then optional, after Medical and Life (but only if you have dependent).

just add new plan and remove the older plan.