It is not good idea to download all modules (ipk files) and install all firmware files too, because you exactly know which modules and firmwares you need for the current usb tuner. Look at your old loaddtt.sh file, or use lsmod command.
I know, there is one big problem, you have to maintain list all needed modules for all available usb tuners, and it is not simple task for one people...
The sat-box is not a linux PC, sometimes you don't have enough space in the flash.
PS: Now, I have to uninstall all unnedeed v4l-* packages from my box.