From Nenad Hrg:
WinBin2Iso converts BIN CD images to ISO images. Files over 2GB are also no problem. When it comes to a quick convert, is exactly the WinBin2Iso conversion tool that you need. The first time that you use it the program it will present you with a license screen. WinBinToIso does not have to be installed and can be executed easily from the desktop, and can be carried on a small USB-stick or other memory device.