Trying to Foreclose on Foreclosure
Mortgage experts say that proportion of homes that end up being sold through foreclosure has been dropping, while number of mortgage delinquencies has risen in last five years or so; cite lenders' intensified efforts to work out arrangements with delinquent borrowers to let them avoid foreclosure and stay in their homes whenever possible; arrangements include temporary cuts in mortgage payments, refinancing mortgages to cut payments and partial claims, in which Housing and Urban Development Department will provide funds for certain homeowners to make delinquent mortgage current; photos (M)