How to create more ripples?
There is no such procedure. While OpenCoin could accomplish it today by changing the code to create such a thing, in the future, the procedure would be as follows:


Propose some kind of change that would create more XRP.
Assign it a 256-bit ID. (It can be arbitrary.)
Release patches that support this change, and announce their support for this ID.
Get 80% of validators to run your patches.
Wait out the two week waiting period for new feature enablement (to give a chance for review and vetoing).
If 80% of validators (weighted by trust) still run your patch, the feature will enable itself and then you can create more XRP. Alternatively, you could try to convince about 50% of validators (weighted by trust) that your patch is so urgently needed that the normal supermajority delay process can be bypassed.