Hi,
For those running NetBSD in Parallels, there's a small change you  
need to for running X11 in a widescreen resolution:
	1) Add your resolution in Parallels custom resolution screen
	2) Running gtf(1) with your custom resolution:

Example for 1280x800 (60/75 hz)

% gtf 1280 800  
75                                                           [~]

   # 1280x800 @ 75.00 Hz (GTF) hsync: 62.62 kHz; pclk: 107.21 MHz
   Modeline "1280x800_75.00"  107.21  1280 1360 1496 1712  800 801  
804 835  -HSync +Vsync

% gtf 1280 800  
60                                                           [~]

   # 1280x800 @ 60.00 Hz (GTF) hsync: 49.68 kHz; pclk: 83.46 MHz
   Modeline "1280x800_60.00"  83.46  1280 1344 1480 1680  800 801 804  
828  -HSync +Vsync

	3) Add these modelines in the Monitor section of your X11R6Config/ 
xorg.conf

Hope this helps.

Regards,
--
Rui Paulo