Here goes:
(script startup EpicMusic
(sleep_until (= (ai_living_count wave9) 0) 15)
(sound_looping_start sound\music\title1\title1 none 1)
)
(script startup ai_place
(sleep_until (volume_test_objects AIspawn (players)) 15)
(show_hud_help_text true)
(hud_set_help_text obj3)
(hud_set_objective_text obj3)
(sleep 150)
(show_hud_help_text false)
(ai_place wave1)
(sleep_until (= (ai_living_count wave1) 0) 15)
(ai_place wave2)
(show_hud_help_text true)
(hud_set_help_text obj5)
(hud_set_objective_text obj5)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave2) 0) 15)
(ai_place wave3)
(show_hud_help_text true)
(hud_set_help_text obj7)
(hud_set_objective_text obj7)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave3) 0) 15)
(ai_place wave4)
(show_hud_help_text true)
(hud_set_help_text obj9)
(hud_set_objective_text obj9)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave4) 0) 15)
(ai_place wave5)
(show_hud_help_text true)
(hud_set_help_text obj11)
(hud_set_objective_text obj11)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave5) 0) 15)
(ai_place wave6)
(show_hud_help_text true)
(hud_set_help_text obj13)
(hud_set_objective_text obj13)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave6) 0) 15)
(ai_place wave7)
(show_hud_help_text true)
(hud_set_help_text obj15)
(hud_set_objective_text obj15)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave7) 0) 15)
(ai_place wave8)
(show_hud_help_text true)
(hud_set_help_text obj17)
(hud_set_objective_text obj17)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave8) 0) 15)
(ai_place wave9)
(show_hud_help_text true)
(hud_set_help_text obj19)
(hud_set_objective_text obj19)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave9) 0) 15)
(ai_place wave10)
(show_hud_help_text true)
(hud_set_help_text obj21)
(hud_set_objective_text obj21)
(sleep 150)
(show_hud_help_text false)
)
(script startup HUD messages
(show_hud_help_text true)
(hud_set_help_text obj1)
(hud_set_objective_text obj1)
(sleep 150)
(show_hud_help_text false)
(show_hud_help_text true)
(hud_set_help_text obj2)
(hud_set_objective_text obj2)
(sleep 150)
(show_hud_help_text false)
(sleep_until (volume_test_objects AIspawn (players)) 15)
(show_hud_help_text true)
(hud_set_help_text obj4)
(hud_set_objective_text obj4)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave1) 0) 15)
(show_hud_help_text true)
(hud_set_help_text obj6)
(hud_set_objective_text obj6)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave2) 0) 15)
(show_hud_help_text true)
(hud_set_help_text obj8)
(hud_set_objective_text obj8)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave3) 0) 15)
(show_hud_help_text true)
(hud_set_help_text obj10)
(hud_set_objective_text obj10)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave4) 0) 15)
(show_hud_help_text true)
(hud_set_help_text obj12)
(hud_set_objective_text obj12)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave5) 0) 15)
(show_hud_help_text true)
(hud_set_help_text obj14)
(hud_set_objective_text obj14)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave6) 0) 15)
(show_hud_help_text true)
(hud_set_help_text obj16)
(hud_set_objective_text obj16)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave7) 0) 15)
(show_hud_help_text true)
(hud_set_help_text obj18)
(hud_set_objective_text obj18)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave8) 0) 15)
(show_hud_help_text true)
(hud_set_help_text obj20)
(hud_set_objective_text obj20)
(sleep 150)
(show_hud_help_text false)
(sleep_until (= (ai_living_count wave9) 0) 15)
(show_hud_help_text true)
(hud_set_help_text obj22)
(hud_set_objective_text obj22)
(sleep 1500)
(show_hud_help_text false)
)