dsPIC33 Flashing with BIN file
MPLAB C30 comes with a utility "mplab-bin2hex" which is used to convert elf and coff files into hex format.  elf and coff are two types of binary file that the mplab toolchain can create, and both must be converted to hex to upload with the pickit2.  If you're in Linux that is located in /opt/microchip/mplabc30/[version]/bin.  If you are in Windows, I have no idea where it is.