OK, at last I have managed to produce a fully UK localised version of the qt4-fsarchiver live cd/usb. If you want to do the same this is how you do it. It might not be the best way to do this but at least it is one way - I am posting from it now.
I already assume you have a live version of qt4-fsarchiver but it is in German and you want it in English. In the opening post on this thread, Gerd50 has already given instructions as to how to change localisations for both 'archiver' itself and the ubuntu maverick version it runs from (as he says please do not bother with the oneiric version unless you read German).
One thing that is missing from Gerd's excellent 'how-to' (and he probably wouldn't have noticed this, neither did I until I tried posting on this forum from the live medium), and that is that despite all the customisations that Gerd has listed, at the end of it all you are still left with a German keyboard. Luckily this is easy to fix. Hit 'System/Preferences/Keyboard and go to the 'Layouts' tab. In here click 'Add' and then from the 'Country' menu scroll down to the UK keyboard layout and click 'Add' then click 'Apply System-Wide' followed by 'close'.
Having done this you are now ready to make your UK localised iso.
*Your next step is to go to 'System/Administration/Remastersys Backup. At this point what you do depends on what cd/dvd/usbkey you have used to install the qt4-fsarchiver iso onto in the first place. If you have used either a dvd-rw or a usbkey of 4Gb or above then you will probably be OK. If like me you have used a 1Gb or 2Gb usbkey or a cd-rw, then you wont be. I have to say that this is the first time I have ever used remastersys and I have read precious little of their help files, so maybe I have missed something about compression, but all I can tell you is that after I had competed this procedure the resulting iso file was 1.7Gb in size which is huge, but that is what it turned out to be, so unless you know remastersys better than I do, then that is what you have to live with. If you have installed to something smaller than that, then I have included a section at the end of this post as to how to get around that limitation for now, but eventually you are going to need something of that size. So from this point on I will assume that your live media is either a 4Gb usbkey or a dvd-rw. If it is smaller than these then you need to read the workround at the end of the post BEFORE you continue.
Your next step then (if your media is large enough) is to login to remastersys (password = ubuntu) and select 'Backup'. You will get a warning that you must close down any open windows etc. so do that then click OK. In the window that appears click the first entry 'Backup' followed by 'OK' and then wait for your backup to be completed, which will take some time. Having done this you need to move the completed iso file somewhere more permanent as you are going to erase the contents of the existing media fairly soon now, and you will need root privileges to do this.
Next shut down the live ubuntu and reboot to a distro on your hard drive. Now use unetbootin or your dvd burning tool to write the iso you have just made to whatever media you want, but remember again that it must be large enough to accommodate the huge remastersys iso.
You should now have a UK localised live version of ubuntu with qt4-fsarchiver. Like I said before, there may be a better way, but I haven't found it yet.
Workround for those with live media with a capacity less than 4GbGo back to the paragraph above starting with a *.
Instead of clicking on 'Backup' here you need to click on the menu item marked 'Modify' then press OK. Then click on item 'd' - 'Working directory =' followed by OK. Change the working directory from the default to a directory which is mounted and writeable in Ubuntu (any of your hard drive partitions or external drives should be OK as long as they have at least 3Gb of space available). Click Ok again and continue where you left off. You now have the advantage that you don't have to move your iso file after it has been produced.
And that is it.
BTW. If any of you know of a site willing to host fies of this size (1.7Gb - without payment

) I would happily upload it and save others the bother that I had in making it. My Dropbox account doesn't have the room to host something of that size.