Üdvözlünk a GTA5-Mods.com-on

So in the Read Me, it says to add a line to - Open 'OPENIV' in EDIT mode, then goto : update\update.rpf\common\data

and add the following lines to the following files:

add <Item>dlcpacks:\rae\</Item>

to dlclist.xml

How exactly does one do this? I don't understand.