In each of the missions Rpghard has taken the stock mission campaign, made it harder, added more enemies, and created different times of day for the mission.
To play simply put the unzipped bundle files into your custom_levels folder. Start GRAW 2 and go in to the Campaign Mode. At the top right of the screen there are now two arrows (since v1.04). Use these arrows to select the custom campaign, then click the New Campaign button at the bottom.
This campaign was started in August 2007 and is updated with new missions regularly.
The version number reflects how many missions are included.
Part 6 'Hostage' a remake of 'Rosen'
In this one you have 2 insertion which has defferent opposition for each insertion ...it's like 2 maps in one.I suggest you tried both insertion