I need help with shipments

I want to get rid of the old shipments and guns in darkrp and put in my new ones. I have version 2.3.7. I saw in another thread that I need to edit a file called addentities.lua, only i don’t have that file. So then another person said to go to the svn:

http://darkrp.googlecode.com/svn/trunk

But when i get there, i don’t know what to do with it. I tried taking the addentities file and putting it in the gamemode folder i have already, but it just fucked everything up. Can anyone help?

[editline]08:40PM[/editline]

bump. Anybody at all?

Wiremod has a good guide on it :
http://www.wiremod.com/forum/wiremod-general-chat/4-wiremod-svn-guide.html