using gnome tinderbox for gnome 2.8

[Jason Trickett]

I'm about at my wits end here. I installed FreeBSD 5.3 w/ GNOME 2.6 from 
cd. Now I want to install GNOME 2.8 from Gnome Tinderbox -- in other 
words /I do not want to use the ports system/, only packages. After 
reading the FreeBSD Gnome installation instructions I'll need to:

# setenv PACKAGESITE 
http://www.marcuscom.com/tb/packages/5.3-FreeBSD/Latest/
# pkg_add -r gnome2

Now I'm guessing I need to get rid of my current gnome 2.6 packages, 
along with my xorg server etc. Is this correct? Is there a quick way to 
do this? And once I accomplish that are my 2 steps above correct? I 
really need straighforward help at this point. I don't have many nerves 
left! :)

Thanks.