Its possible I guess, but if using it for downloads then its better and easier to use the normal method of loading What's New from the internet as all links work and it can update automatically.
Its a shame this is limited to psns type links, this method would have been perfect for webman launchpad and stuff like that. All webman would have had to do is copy the images and xmls for games found into the WSCREEN folder, and then all games would show up icons in correct proportions with no xml generation and also no XMB reload needed to see changes. You could add new games and just exity and enter whats new to see them.
Anyway this psns limitation fucks it for me for everything.
On a related note i found a way to load Whats New segments in a normal XMB menu, it loads up full size icons which is strange to see. Also swfs work.
using wboard://localhost/list?
Have I got enough clocks.?!
It has issues though, icons overlapping and no titles.