Try to add the custom .pbo's that are in the modpack you want (YOURMODPACK\Addons\ then all the names of the pbo) in your mission.Sqm just like on Taviana,
Taviana's Mission.sqm :
version=11;
class Mission
{
addOns[]=
{
"tavi",
"kh_dayztaviana",
"ca_modules_animals",
"dayz_anim",
"dayz_code"...