Can't bootcamp back to MacOS from Win32bit

Hello all

I recently boot camped my Mac book pro and installed a windows 32bit OS (although this was accidental, I wanted 64bit). Once everything was complete, I couldn't find the bootcamp icon to go back to the Mac OS. Also, I believe a lot of devices, such as the network adaptor, weren't installed. I think these files are on the USB that I used during the boot camp, but I can't open them since they require 64 bit. I have tried installing windows 64bit but my bootable disk doesn't work during the laptop reset. I currently have no internet access at all and so am quite conceded with how to proceed. Any help regarding this would be much appreciated.

Thanks.