I just finished installing smf.I used the installer to install it and I wanted to know if I had to changed the chmod of some files for security reasons?
there is no install folder in SMF, there is an install.php and should be deleted. my permissions are as follows: folders 0755 all php files 0644 Settings.php 0600 but this is me, if these settings don't work for you then up the permissions a little.
The only file that may needs chmod is the Settings.php and that is only in the case that XXS is open to your host. As the XXS exploits are very old, propably you want need to change anything