I just saw this thread and I downloaded YUMI.
I have already created a WinPE Bootable DVD via Macrium ver5 and I thought I'd try out this usage of YUMI. Now I tried to add the ISO image of the WinPE Rescue Media of Macrium ver5 + ISO image Acronis Media (ATI Home 2011) + ISO image Acronis Media (ATI Home 2012).
The creation went well but when I booted to usb(4gb Adata brand) only Acronis Media ISO of both 2011 and 2012 were working. For Macrium I got an error.
Error 15: File not found.....
Press any key to continue.....
So thinking that maybe it was the ISO's of Acronis that is the culprit, I reformatted the USB and did it again. This time with only the ISO image of the WinPE Rescue Media of Macrium ver5. Creation went well but when I booted and selected Macrium Rescue Media ISO I got the same error!
Tried another USB Stick this time a Kingston 512mb -- same error.
Reformatted (Kingston 512mb)and selected only ISO image Acronis Media (ATI Home 2011) + ISO image Acronis Media (ATI Home 2012). No error and I was in fact able to create a backup and restore a backup image! Nice.
Now just to be sure I created a WinPE Rescue Media via the Macrium ver5 gui. Selected the same Kingston 512mb drive letter. It went well. Tested it a WOW it worked!
So I guess the WinPE USB Rescue Media creation via the Macrium gui is okay. But when the ISO of that same 'WinPE USB Rescue Media' is selected in Yumi I have an error.
Now making one USB stick that has essential tools is very good and highly recommended. I have both Acronis and Macrium(free) and I'd like to have both WinPE ISO working in Yumi.
Can someone help me please..