Are you trying to install Slackware? If yes, rawwrite.exe is included on the DVD image. If you have burned it, put the DVD your system running windows, and open explorer.
There is a directory called 'isolinux' and inside there another called 'sbootmgr'. In that dir you will find rawwrite.exe. My DVD is a 64 bit version, if you have a 32 bit version, look around the DVD, in case the dir structure is different.
Also see Slackbook on the DVD section 3.2.6 for instructions on how to use rawwrite.exe. The boot image is there too.