Logo and poster cache

Can you make DVR to cache channel logos and guide posters? All of my logos and some of the posters is stored on my home network so when connecting remotely those are missing. On some similar apps this done by import function that you can run on local network and your phone app downloads them for offline usage. Of course there is also VPN but i prefer not.

In addition to a channel logo and poster cache, we also need an option to resize these cache images files.

Thanks.