Can you help me please? i think that every one will be interested..

the sitemap tool is working for a year on my board..
but, Google like to index pages from my board that are really old, and i don't want google bots to access those pages, (don't need them to be indexed..)
which means that i shouldn't send google in the sitemaps old URLs..
I have just one google bot on the site, it is the same bot that is downloading all the sitemaps, and it his crawling my board a lot, so I want it to crawl new threads , what do I need to change to Generate filtered sitemaps (which means that only threads from a certain date will be included in the site maps files) can you please help me?

Hello,

vBSEO Sitemap Generator currently doesn't allow to filter (cut) included URLs by date.

is there a way to do that? with knowledge in programming?

Yes, that can be achieved with modification of vbseo_sitemap_functions.php file.