I really need some help here (tried search). I'm getting ready to start my HT and I don't know a) what aspect ratio to make my screen (16:9, 15:9?). b) what resolution to set my xbox360 c.) whether to select xga or wxga in the projector menu. I have an xbox360 which displays the following resolutions using the vga cable:

640×480, 848×480, 1024×768, 1280×720, 1280×768, 1280×1024, 1360×768and 1920×1080.

below is the chart of RGB signals for each computer mode (?) of my projector, mits hc300u

signal; resolution; vert/horz freq;. normal mode; real mode;

TV60, 480i(525i) - 15.73 59.94 1280 x 720 -
TV50, 576i(625i) - 15.63 50.00 1280 x 720 -
1080i 60 (1125i 60) - 33.75 60.00 1280 x 720 - *2
1080i 50 (1125i 50) - 28.13 50.00 1280 x 720 - *2
1080i 50a (1125i 50) - 31.25 50.00 1280 x 720 -
480p (525p) - 31.47 59.94 1280 x 720 - *2
576p (625p) - 31.25 50.00 1280 x 720 - *2
720p 60 (750p 60) - 45.00 60.00 1280 x 720 - *2
720p 50 (750p 50) - 37.50 50.00 1280 x 720 - *2
PC98 640 x 400 24.82 56.42 1228 x 768 640 x 400
CGA70 640 x 400 31.47 70.09 1228 x 768 640 x 400
VGA60 640 x 480 31.47 59.94 1024 x 768 640 x 480 *2
VGA72 640 x 480 37.86 72.81 1024 x 768 640 x 480
VGA75 640 x 480 37.50 75.00 1024 x 768 640 x 480
VGA85 640 x 480 43.27 85.01 1024 x 768 640 x 480
SVGA56 800 x 600 35.16 56.25 1024 x 768 800 x 600
SVGA60 800 x 600 37.88 60.32 1024 x 768 800 x 600
SVGA72 800 x 600 48.08 72.19 1024 x 768 800 x 600
SVGA75 800 x 600 46.88 75.00 1024 x 768 800 x 600
SVGA85 800 x 600 53.67 85.06 1024 x 768 800 x 600
XGA43i 1024 x 768 35.52 86.96 1024 x 768 -
XGA60 1024 x 768 48.36 60.00 1024 x 768 - *3
XGA70 1024 x 768 56.48 70.07 1024 x 768 -
XGA75 1024 x 768 60.02 75.03 1024 x 768 -
XGA85 1024 x 768 68.68 85.00 1024 x 768 -
WXGA60 1280 x 768 47.77 59.87 1280 x 768 - *3
MAC13 640 x 480 35.00 66.67 1024 x 768 640 x 480
MAC16 832 x 624 49.72 74.55 1024 x 768 800 x 600
MAC19 1024 x 768 60.24 75.02 1024 x 768 -
HP75 1024 x 768 62.94 74.92 1024 x 768 -
SXGA60 1280 x 1024 60.02 63.98 960 x 768 -
Specifi cation of RGB signals in each computer mode of the projector
Signal mode Resolution Horizontal Vertical Normal mode Real mode
(H x V) frequency (kHz) frequency (Hz) (H x V)*1 (H x V)
*1 : When ASPECT in the FEATURE menu is set to AUTO
and SCREEN SIZE in the INSTALLATION menu is set
to 720p(16:9).
*2 : Available for the signal for HDMI IN terminal.
*3 : To display images of XGA60 or WXGA60 signal, set
XGA/WXGA in the FEATURE menu according to the
desired signal.
Important:
• The projector's maximum resolution is 1280 x 768
pixels. It may not display images of higher resolutions
than 1280 x 768 correctly.

I really appreciate any help I can get here, I'm looking to begin the project tonight.

Thanks