I need help triggering

I need some help triggering in my upcoming map. I want to have areas for "creeping" in other words i want X amount of creeps at point X every X minutes. How would i set that trigger up?

I also want to set "Special Effects on the left arm of unit permeantly ( although its a summoned unit so every time its summoned i would like the effect to be there permeantly without having to say or do anything)

Can i also have a triggeer to special effects be from using a specified ability.

How can i make a "Quests" section ? Because i want to have a "help" and "credits" area under the Quests tabs

for the creeps stuff:

Haven't done this but it should be something like the following:

Event:
Every x seconds

Action:

Create y amount of "some unit" at "some region of your choosing".

for the special effect:

I haven't messed with it in awhile, but UMSWE has a txt file that comes with it that lists that attach point for effects. so just make an action that says create a special effect (it'll need the address of the model you want on the arm here) on the "left arm". It's not gonna be "left arm", but check that txt file and you should be able to find what the attach point is called.

The last two questions i don't understand. PM me if you need ne more help.

Regarding to Special effects by adress i take it you mean when you select a unit on the map to be a triggering unit, but thats the thing. This unit is created from a custom spell. I want the special effect to attach when he is created from this special spell i dont think i should use Summoned unit because there are other unit summoning spells in the map and i dont want all summoned unit with this effect