the .udf does look bloated,like there is a lot more to it than just a sat/channel list.
Maybe try saving a channel list with the usual alieditor via rs232 and see what the size of that is.Then try to match a script.ini.The actual list seems to be just a fraction of the full file that was posted.
The rs232 loader also lets you save chunks of firmware,maybe that user database would be smaller.