First, the distribution you are using has no impact on Modelines. If you want to provide version information your XFree86 version might be a bit more helpful, although Modeline interpretation is a fairly static part of the codebase. Other helpful information would be what HDTV/monitor/projector/etc you are using, and your video card.
Here's some settings I've been using that are related to home theater. NOTE: None of these have been tested on anything other than a computer monitor. Only about 2/3 of them work on a computer monitor. It's my work in progress. Not all of them are meant for HDTV output (some of them may cause your screen to explode and risk injury to anyone in the room. Or not, as I said they haven't been fully tested). You can tell fairly easily which ones are 540p though, I haven't created any 1080i timings yet. Also I have no idea what HDTVs use negative or positive polarity, you might want to check out your specs and adjust accordingly. These are mostly set to negative polarity.
# NTSC Output
Modeline "640x480" 12.700 640 656 744 808 480 492 502 528 -hsync -vsync Interlace
# 640x480 Progressive (for use with TV converters)
Modeline "640x480" 25.175 640 656 720 840 480 481 484 500 -hsync -vsync
# DVD 1
Modeline "720x480" 31.590 720 796 836 936 480 509 510 563 +hsync +vsync
# DVD 1.5
Modeline "1080x480" 47.250 1080 1188 1236 1400 480 509 510 563 +hsync +vsync
# DVD 2
Modeline "1440x480" 63.180 1440 1584 1664 1872 480 509 510 563 -hsync -vsync
# DVD 540p
Modeline "1800x540" 77.220 1800 1948 2044 2288 540 547 548 563 -hsync -vsync
# DVD 540p wide
Modeline "1920x540" 82.350 1920 2081 2185 2440 540 547 548 563 -hsync -vsync
# Standard 540p
Modeline "960x540" 42.120 960 1058 1106 1248 540 547 548 563 -hsync -vsync
# 16x9 DVD
"1024x576" 58.885 1024 1056 1160 1328 576 611 614 739 +hsync +vsync
When you get bored of those and want to make your own:
Convert powerstrip modelines to XF86Config:
http://www.hut.fi/Misc/Electronics/f...2rgb/calc.html
Lots of good examples (use the above link to convert):
http://www.digitalconnection.com/Sup...ffnotes_17.htm
Good reading on the subject:
http://www.avsforum.com/avs-vb/showt...threadid=33207