Utilities like XBoot, YUMI, etc. need to know about how each linux distro is made and what specific cheat codes are required and what the squashfs filesystem name is. If the specific distro is not listed by the utility, then it will try to make a best guess (or you need to pretend/force the utility to treat is as a similar distro and hope it works!)
Sadly XBoot is not supported any longer as the author has passed away.
For linux distros, you could try my Easy2Boot project. Just copy any number of linux LiveCD ISOs to the E2B USB drive and boot - simple!
99% of linux LiveCDs just work and Easy2Boot does not need to be updated every time a new linux distro appears as it works in a different way.
P.S. Just downloaded the jondo-live-cd.iso and copied it to my E2B flash drive - it boots fine :-)