You can sort, or build a favorites only list and lock all others with a password that you can change to what you want, BUT the this will be different for each type of receiver, so a specific instruction would have to be in the receiver section. In the mags you can add and delete at will in the inner portal, but the in main it is a factor of having an open portal for loading new channels, and dropping dead links.
BTW GREAT job adding these this is coming along much quicker than I expected, and is looking fantastic!!!