Tvheadend

Hi there,
I would like to ask for some improvements in the great software that is tvheadend:
On Imagecache:
Don’t download images if they exist on metadata.
Run python script for channels X,X,Y, to download images to image cache.
Similar to epg but to download only images – (api need it???), the idea is to run some commands and then download images from xmltv tag…. (I hope you understand what I mean)…
Custom images to custom programs:
Some html editor, with some strings link/build a json file (for ex.) and can add to database a custom url image, and then add it to metadata, something like Add images inside the metadata server, by the user.
Thanks