lightning fast vB

[Tradjick]

Some things in vB keep the same over the whole board. Like for example the header, footer, forumhome (minus the latest threads), etc.
Would it be possible - for a registered user - to have parsed for example the header on it´s hard disk, and with an if clause make his browser call it, when it´s present???
I´m also wondering if it would be possible to store the information in the threads on the local disc, for example the posting #1, posting #2, etc. The script would check if there hasn´t been edited a newer version of that posting, and if not, it would take the information stored locally.
What do you think, would this somehow be possible? Even with a certificate or with a downloadable installer???