More resolutions for vga displays

Would it be possible to add more resolutions for vga displays (which I am accessing via vnc instead of spice)?  In particular:

- 1080 wide x 1920 high (rotate 1920 x 1080 screen)

- 1920 wide x 1080 + 1980 high (1920 x 1080 screen on top of 1600 x 900 screen)