[ubuntu-uk] Custom Ubuntu Image pendrive problems

[Tim Dobson]

Hi guys perhaps you can help.

I'm producing a customised Ubuntu alternate CD at the moment so we can 
install Ubuntu at work with a custom set of packages, in our case, 
orientated towards Asterisk.

I've followed the instructions on the Ubuntu Wiki and the iso image 
appears to work fine on a CD.

However, we would like to put this iso image on a USB pendrive.
I've used unetbootin and usb-creator but both, sadly give the same problem.

Initially it boots up fine however when it comes to search for a CD 
drive it doesn't find the usb disk and fails on that option meaning one 
cannot continue the install.

The specific error message reads "The Installation CD-ROM could not be 
mounted. This probably means that the CD-ROM was not in the drive. If so 
you can insert it and try again"
(and it then asks you whether you'd like to try again with yes returning 
the same message and no returning a list of tasks in the install process 
however you cannot advance without it knowing where it should expect the 
CD image.

Does anyone have ideas on how to solve this or work around it?

Thanks,

Tim