c:\@Work\Perl\monks>perl -wMstrict -le
"my @names = (
   'JAMES SMITH-JONES',
   'BOB SMITH-SMYTHE-SMITH',
   'J. JONAH JAMESON',
   'BILLY BOB THORNTON',
   );
 ;;
 for my $name (@names) {
   printf qq{'$name' -> };
   $name =~ s{ \b ([[:upper:]]+) \b }{\u\L$1}xmsg;
   print qq{'$name'};
   }
"
'JAMES SMITH-JONES' -> 'James Smith-Jones'
'BOB SMITH-SMYTHE-SMITH' -> 'Bob Smith-Smythe-Smith'
'J. JONAH JAMESON' -> 'J. Jonah Jameson'
'BILLY BOB THORNTON' -> 'Billy Bob Thornton'