You can also do it with Nero 6 (not sure about 5, didn't use that one), which is eventually easier, by selecting
CD-ROM (boot). Then you go to the
Boot tab, click on
Enable Expert Settings (for advanced users only) and select for
Kind of emulation Floppy Emulation 1.44MB (or 2.88MB if you have such a floppy and drive) and leave the rest below it untouched.
For
Source of boot image data above select the floppy drive where you have the bootable floppy in. As for the rest of the floppies, as Dosraider told you'll need to copy them onto the CD without folders. When prompted to insert the next floppy, just select the CD drive.
Oh, and as for CD-Rom support, you would need to put some Dos driver for CD-Rom on the bootable floppy and insert a loading line in config.sys (
devicehigh=driver.sys /d:mscd0001 for example), since the Ms-Dos floppies don't have one by default.
This one should do finely, scroll down until you find the line:
CDROM.EXE Universal IDE CD-ROM Driver for MS-DOS & Windows (By OAK Technologies) 162KB