can somebody help me here please? is it posible to render in bigger screen resolutions?

What program? If you're using 3ds max, press f10 and you'll see a tab called output size, and blam, change the parameters.

You're not by any chance using Brazil Rio are you? because this gets asked quite a lot for this program.

If you are using Brazil Rio you need to search for a plugin called Bigrender ( i think thats what its called ) that should do the trick

i have brasil rio + bigrender but its limited to 1000x1000