Can i use the example script to update ports?
also, acording to this some pre-compiled ports will need a newer kernel ?

sorry if i am repeating myself a little on the other thread, its my first few hours using freebsd.

thanks in advance

I've never needed to do that myself. I always use "portupgrade -a" and everything gets updated. Those instructions seem to be for people using bleeding edge versions of FreeBSD.

The information in the link you specified is indeed the way to stay bleeding edge, but also the way to properly upgrade between different versions of FreeBSD. Portupgrade is what you want when upgrading a single port against security advisories and or upgrading your ports after a major change of version numbers in FreeBSD, ie: 5.4 -> 6.0.

If you ever need to upgrade all your ports after a system upgrade, and I'm sure you will, try portupgrade -afrR, read the manual page for more details. This essentially should make sure that all your installed ports work properly with new libraries installed by the base system.

You should not have to do the above when moving between version numbers such as 6.0 -> 6.1. Portupgrade -a will work just fine in that case.