How to change dimensions of the game above 800x450

I accidentally posted 2 threads and then I accidentally deleted both of them. I wanted to re texture the game with HD textures but i cant make them any bigger than 800x450 pixels or else it will zoom in can anyone help thanks.

Open your "PPDConfig.exe" in PPD folder, then change the window size. Check the fullscreen if you want to.
Hope this solve your problem :)