LPR's are nearly the same as dprs btw (one or two FPC specific directives). The different name is for sake of file associations.
There is no way to export a Lazarus project as Delphi, but the differences are mostly trivial. Keep in mind that most source 2 source projects are only half automated at best, specially the free ones. You really need to know what you are doing, it is not a "convert" one button press conversion.