[syslinux] isohybrid boot from logical partition

[Duncan Elliot]

Hi,

I have been attempting to set up a multi-boot USB stick (i.e. multiple
bootable ISO images on the one stick)
I have had good success by:
- processing ISO with isohybrid (with "partok" flag)
- dd'ing ISO to primary partitions on the USB stick (e.g /dev/sdc2,
/dev/sdc3, /dev/sdc4)
- installing grub to USB stick and configuring to chainload to these
partitions

To remove the limit of 4 partitions, I would like to do the above but
utilise logical partitions.
All my tests to do this have failed, and generally result in the error
message "isolinux.bin missing or corrupt." when trying to boot.

Is this possible to achieve with current version of isohybrid?

Any help on how to achieve this is appreciated.

Thanks
Duncan