you can always use the dreamboxuk frontend and database to create your new bouquets, its updated with freq changes etc and is in line with slys epg numbering.
upload them to your hosting.

then you can install the autoupdate plugin and initiate a download of the new bouquets from your hosting on each box. this is what i currently do with family / freinds

i just create a new set of bouquets and upload them to my hosting, then the user can initiate the download of new bouquets from there box and it installs them. you can always set it up as a cron job too.