I added that PS3 ProxyServer Installer app to the post above... it's non-English though, so don't be suprised if it's difficult to figure out without a picture-based Tutorial. My guess is you can do the same thing with what's detailed in the first few posts of this thread using browser plug-ins/add-ons.
cool, thanks. i was just going crazy trying to find this on the net after it was removed. more stuff to play with, hehe. but i guess you can do the same thing with more dns entries in our dns servers. rerouting the ps3's request for a particular demo to our local webserver, then just drop the *.pkg in the correct folder path on the local webserver, according to the links below.
i cant get this to work, but once i do what i think is right while the ps3 proxy.exe is open it says i need to system update but when it is closed there is an internet connection error. weird :?? but anyway i'll keep trying until someone posts a better step by step tutorial.