The Intel(R) video controllers will support any video resolutions within reason that are listed as natively supported on the EDID of the display you connect. However each computer or Original Equipment Manufacturer can limit the range of video resolutions for their systems.
Therefore in this case, we suggest you to check directly with your netbook manufacturer to see what is the highest resolution that they have tested on the video ports available on your system.
HP does not seems to have a forum unlike other vendors.
I am also disappointed that machine cannot support more than 2 GB of memory (I upgraded to 2 GB)