I have been trying to get my ESX-4.0.0-update01-208167.iso image put on USB to install Full ESX 4. I used syslinux and copied the media files over. after renaming isolinux folder to syslinux and copying the isolinux.cfg to syslinux.cfg I got a successfully booting CD. It worked fine and booted up and the install started.
However, when it goes to find the rpm's, it tries to mount the CD to /mnt/source and the install fails. Anyone every get the install media successfully working from USB media? I tried askmedia but it just prompts to insert the cd. Any way to get it to look on the usb for the media?
I resolved this by replacing "install cdrom" with "install usb" in my ks.cfg file.