With the Home Affordable modification program..............it doesn't work that way...............your mortgage payments would need to be over the 31% target of the gross income........in order to meet the initial criteria for a modifcation...............this figure does not include a second lien payment.
Front-End DTI is the ratio of PITIA to Monthly Gross Income. PITIA is defined as principal, interest, taxes, insurance (including homeowners insurance and hazard and flood insurance) and homeowners association and/or condominium fees. Mortgage insurance premiums are excluded from the PITIA calculation.
here are the guidelines............
http://www.treas.gov/press/releases/...guidelines.pdf