Can i setup lastmodiffied if modiffied headers to my vbulleting pages?

[postcd]

Hello,

i want to setup some information in return headers that tells crawling bot that forum topic (for example) was not modiffied so he should not redownload page.

How can i do this please? I already have last-modiffied headers for certain file types, but not for whole page which is what i want..

There are some examples: https://stackoverflow.com/questions/...aders-with-php
But im unsure how example i can do it in vbuleltin?
Thank you