I try to open a profile, I get this:Not Found

ok i know that im supposed to do this: The problem is that your Apache server is not compiled with mod_rewrite module or you don't have rewrite instructions in your Dolphin's root .htaccess file. These instructions should be as follows:(theres a bunch of stuff here im not gonna copy and paste it but ill put the web address)

http://www.boonex.com/trac/dolphin/wiki/GenDolTShooter#WhenItrytoopenaNavigationMenulinkorsomebodysprofileIgetthispage:NotFound

but i dont understand how to do that.....

As usual, in dolphin package we have necessary .htaccess file with all rules.

Seems that you just need attach mod_rewrite module to your apache server. Or ask techsupport of your host do it.