1_ Unetbootin is not recommended for UBCDLive.
2_ dd-like methods are not recommended for UBCDLive.
3_ Under Windows, there are additional alternative programs (e.g. RUFUS http://rufus.akeo.ie
, I have not tried with SARDU http://www.sarducd.it
4_ Unfortunately, the manual steps included in UBCD 5.3.4 (and older) for Linux users are not completely correct (not even for UBCD 5.3.4 itself, see for example https://www.ultimatebootcd.com/forums/viewtopic.php?p=25569#p25569
) so I cannot suggest to adapt those steps to UBCDLive. And yet, many Linux users (with some experience) should be able to use similar steps for UBCDLive (although, the aforementioned correction of the steps would still be needed).
5_ Some Linux distros have scripts (not using dd-like methods). I cannot suggest any one in particular. Perhaps someone wants to test and report?
6_ Considering that UBCDLive is currently based on DebianLive, perhaps some of the methods used for ClonezillaLive and/or GPartedLive _might_ work for UBCDLive, in particular the "manual" alternatives. They very probably need some adaptation or additional correction; I have not tried them.
See: http://gparted.org/liveusb.php#linux-setup http://clonezilla.org/liveusb.php#linux-setup
7_ Although I have not tested it, there is a tool at http://live.learnfree.eu/
. I do not know in which Linux distros hosts this tool would be available / would work correctly with UBCDLive / is updated.
8_ Test with http://multibootusb.org/
(I have not tested it).
DISCLAIMER: For anyone trying any of these methods, you should know that you are the sole responsible for whatever you do with UBCDLive and/or with any of these tools. I am just providing these comments with good intentions, as generic information for potential users' convenience. I have nothing to do with any of these tools, and I am not responsible in any way regarding any of these tools or their consequences. In other words: use at your own risk.
Feedback, results, experiences... are all appreciated.