I am new to this aswell but I found this in docs/install.html:
If you have Shell access to your account, you can do all of the below. If not, you can skip the first part (chown), but the second part can be done from most FTP clients. It is recommended you set your directory permissions, as this makes thing much more secure, and some functions of Geeklog require this. If you cannot do the first part of this, it doesn't matter too much, as it is most likely set up - just remember never give access to Geeklog anyone who your don't fully trust.
So you dont have to do it if you can't!
Bosshogg