update ports from a file

[Mr Anderson]

Hello

I have been using FreeBSD in the Univ recently and quite interesting. I
decided to installed FreeBSD 6.2 in my laptop (I dont have internet
connection) and now I want to install apache and other software. So, I
downloaded  ftp://ftp.freebsd.org/pub/FreeBSD/ports/ports/ports.tar.gz and
copy to my laptop to update ports.
How do I update ports from the
file? Right now, I have an old version of Ports, portsnap fetch does not
work because I do not have internet
connection, and FreeBSD does not recognize my netowrk card reader, so
I want to do it by hand , step by step.

Any tip how to do update? Should I just unzip the file in /usr/ports , but
previosly delete everything???


Thanks

Anderson