CoDJumper.com

Delete plz

Multiple ways. One(the easier way but less versatile) is to make a trigger_use_touch and give it a hintstring(press N to bring up the entitiy window, select the trigger, then add these keys and alues: key - hintstring, value - *Your text here*).
Another is to print a line of text directly from the script by using iprintlnbold("Text");.
Yet another way is to also print text from the script, but making the text permanent by making a new HUD element (newHUDelem()/newClientHUDelem(player)).

Delete plz

Help you with what exactly?

On a side note, mp_elevator_madness sounds like the worst idea for a map ever.