Getting full length or short films on imdb.com?
 

Is it possible?

Sure, it's possible, as long as they meet their guidelines, just submit the info. Don't have link handy, but not hard to find on imdb.com.

Sure it is. I wrote a short film for some company (produced). It's on IMDB. I wrote a feature (produced) for some other company. It's on IMDB. Everything I've written are all under different names, so no one name lists everything I've written together. I suppose one day I'll fix that. But then again, I've been saying that for five years...

the requirements are listed, I think the short or feature must have been shown at a festival plus some other requirements, I try to get everything I've done listed - it's becoming a quick way for people to check you out.

Don't expect it to be easy or quick - it's a slow process.