Most distributions that come on CD come with a utility to make a boot floppy. Look on disk 1 under dosutils. The biggest question is if you have the means of reading a Linux CD.
Here's how to make a boot floppy for Mandriva 2006 (as an examle - it's what I use) (warning - this is strickly from memory - I haven't used rawrite for a while):
run <CDROM>\dosutils\rawrite.exe in windows or dos.
enter "install\images\cdrom.img" when asked for a floppy image.
enter the dos drive letter of your floppy when prompted.
When it's finished, you will have a floppy that will boot linux, and start the installation from the first cd.