[@mercime]

What @djpaul said, no shouting please.

“when i try to go to the forums setup to get it to work and click on install on an existing installation it alwats sd cannot find bb-config.php file no matter what directory i use.”
Assuming you understood that the terms “existing installation” refers to existing bbPress installation, then point to the folder where you existing bbPress is installed. Otherwise, check this out https://codex.buddypress.org/getting-started/configure-buddypress-components/#forums-setup