Doing a web load has been around a long time, but the average user may not be aware of it. What is really neat about this is that you have older thin clients, they would be perfect for use with the web boot for the ones that will. While I was at it, I was able to get it to boot from tftp server to a thin client. That setup is more involved and for another day. One shortcoming is that Slitaz does not seem to use the usb keyboard out of the box.
If you have been following my articles, you should be aware of how to make the boot media for the ipxe boot. Had to get to files to the web directory to boot from first is the iso of course and the second is the memdisk. If you have syslinux installed, it should be there on your system.
chain http://192.168.1.32/debianlive/memdisk iso raw
kernel Kernel/memdisk (or http://192.168.10.1/Kernel/memdisk) append iso initrd=192.168.10.1/Images/ubcd.iso
In doing the research for this, quite a few ways to do this.