Sorry for the delayed response...
OK, that Information Prompt mod went pretty well. Would it be possible to try adding a new 'Calculated' or 'Generated' UI column where the driver would load channel information at the get_memory call? This would be 'write-only' (my personal favorite) text that is not uploaded, downloaded or even set back into memory. My application would be to generate the FT-450 memory group labels, where channel 53 is also labeled 'MEM-02-03'; the 3rd channel of 10 50-chan groups.
If the implementation is right, I could go for something like this. Maybe bang out a POC and post it so I can see what all would be involved and we can discuss.
Does it need to be a column necessarily, vs. something in mem.extra? If it's a column, it needs to be readonly for the UI user in some way that won't be confusingly un-ediable when they think it should be. Could also be a hover-over tooltip type thing...
--Dan