I think "how do I?" may have been how some users introduced their questions in the old forum. That's a good idea to add that to the case studies.

In the case of modeling a refinance or quicker paydown on the mortgage, you can "save as" a copy of your family profile (or write over the existing one) and in the area where you enter monthly payment, balance, and years remaining enter the new numbers. I typically use the mortgage calculator at BankRate.com to fine a new mortgage payment at a given time frame and interest rate, but those calculators are not hard to find. You might also want to enter some closing costs if applicable as a one-time special expenditure but often those have negligible over the long term.