Is it possible to make a seperate hud_item_messages.unicode_strings_list for a scenario? Like, a scenario has its own hud_item_messages without haveing to edit the original one.

Um....I don't know much about this stuff, but why don't you just rename the older one "hud_item_messages2.unicode_strings_list" and the newer one "hud_item_messages.unicode_strings_list" ? It probably isn't much of a hassle to do, or if not, look inside the actual scenario or structure_bsp and look around for the section of the hud_item_messages.unicode_strings_list.

I'm not positive but I'm pretty sure that relates back to your globals. But you can edit your globals, just ALWAYS have a backup, never edit it and save if you don't have the original copy.