Yes that works, too.
Because there were some more CTDs which were Item related. I added this line and:
// --> added by BlackDeath for Sidequests ;-)
n = InitQuestItem(n,"Chest", "chest", "", 4, 1, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"coins", "coins", "purse", 4, 15, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"gov_letter", "gov_letter", "", 4, 3, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"idol", "incas_idol", "stat1", 4, 4, 1,0, "","", "Labirint_3","button01", "","","" );
n = InitQuestItem(n,"icollection", "incas_collection", "", 4, 5, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"legend_piece", "piece_of_legend", "", 4, 6, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"legend_notes", "notes_of_legend", "", 4, 7, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"legend_copy", "copyes_of_legend", "", 4, 7, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"rheims_journal", "rheims_journal", "", 4, 8, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"domingues_f**ked", "compramat_to_domigues","", 4, 9, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"rheims_letter", "rheims_letter", "", 4, 10, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"pornushka", "love_letters_of_priest","", 4, 16, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"animists_amulet", "ANIMISTS_amulet", "", 4, 12, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"letter_to_domingues","letter_to_domingues","", 4, 11, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"letter_to_bernard","letter_to_bernard", "", 4, 11, 0,0, "","", "","", "","","" );
n = InitQuestItem(n,"letter_prison", "prison_letter", "", 4, 10, 0,0, "","", "","", "","","" );
because of the CTDs occouring because of the Sidequest Sao Feng.