its posible to make a basic display with a UI interface you would have to actualy program some fucntions to get it to update. All you realy need is to have it delete a PK3 by name then re download it. when you update the PK3 in the ftp or online space it will be re downloaded and the latest info will show
since the UI are such low memory it might be good to have a button to delete the pk3 and re download then try open everyhting including the layout and news for the PK3 so you can total update it every time rather then just images
and if you are going to hhave images that you want to use in say every page like a fancy header or something (esspecialy if it uses effects and needs to be .TGA) have that in a different pk3 that stays on the system permenantly to avoid re downloading files that dont change
if programing is not an option since you want compatability with another mod e.g. ET pro. then maby you can have a small mod that removes a pk3 by name then redirects to you clans server and then will download the latest pk3. could work but might put off a lot of players who dont regularly use the server