Is there a way to program a button wich can lower or elevate projector screen with a single touch. I have tried and what I get is not good. The screen starts then stops, and then all over again. I would like it to go as if I was holding that button myself for 15-20sec. Does anybody know what to do?

Does the button you have now work OK if you keep it pressed for 15-20 seconds?

If so, then there are some techniques for emulating a long push, but they only work sometimes depending on the equipment you are trying to operate.

The simplest is to put repeated aliases to a button with the down (or up) code. If that does not work, then you can trying modifying the IR code (but again, that does not always work).

Forgive me for taking an non-traditional approach.
What type of screen and IR control interface are you using?
Your current method of lowering and elevating the screen are somewhat antiquated for motorized screens. Is it possible to keep the screen, but change the control interface to 12v or updated IR interface?
Just a thought.

Thanks for your help guys.

Could you direct me where I would find out more about aliases or code modifying since I couldn't find it an original manual or anywhere else. But then again I'm new at this.

One other thing I should mention is that I use european pronto NG model RU 980,but I don't think that changes anything. Projector screen is also european, model PROJECTA whose original remote has only up and down.
I've learned those codes to pronto and when I keep pressing it everything is ok. I just hope there is a way for not needing to keep it pressed and that pronto could do that programed.

Thanks again!