Sorry, not familiar with your graphics system, however it would be better at least to allow the process continue before you install the drivers you have got. Almost certainly you will need them at some point, but at least get a baseline - for this purpose I would highly recommend using the DVD install on a separate drive until you understand the nature of your graphics system. NB: the DVD install will destroy everything on your drive, not just partition! I don't recommend this because it is more compatible, it isn't, its less - but it gives you a chance to play with the settings a then rebuild LMCE everytime you need to in 20mins rather than the CDs which take at least 3 hours!
When you feel you understand what drivers and xorg.conf settings you need, then you can do a full build with the CDs. That's just my suggestion.
Onto your issue - assuming that you have got to the AV Wizard, X (the windowing system) is trying to start up and take over from the text based command line interface. If it tries to use settings that are not compatible with your video subsystem or monitor/TV, or worse, not even outputting on the right output connector, then you will get a black screen.
Most likely it is outputting to the wrong connector or at a resolution/refresh rate your TV/Monitor cannot handle - the default is to use the VGA port at 640x480 at 60Hz. You say you are using DVI, so this is a good candidate to start with.
The Wiki (and many forum posts, if you search for them) detail the shortcuts. But from memory, you want to hit "1" on the keyboard after the screen has settled down. This selects the DVI/HDMI output you need. 2-5 progressively choose other outputs. From the description of your monitor, it sounds like it will be able to handle a wide range of resolutions and refreshes. However some cannot handle the very low or very high resolutions - usually refresh rates are not too challenging for most screens. You can use 6-0 on the keyboard to change the resolution until you see something. From there you can use the wizard to set the real resolution you want.
Remember, each time you press one of these number keys, X has to shutdown, switch back to text mode, reconfigure itself, process the xorg.conf file, and switch back into graphics mode and your display has to adjust and settle down. So give it at least 10-15 seconds to do this - you should notice HDD activity and probably screen changes/flickering as this goes on. After all that, you can try another setting. I would try hit <1>, wait 15 seconds, then hit <6> or <7> and wait another 15 seconds.
In terms of fine tuning the detail - especially on a digital output, the wizard won't help much. If you get your screen misplaced, or even more, if you find that the "virtual desktop" size is larger than the physical screen size so that you have to scroll/pan around your desktop using the mouse, then you definitely need to edit your xorg.conf file.
Option "UseEDID" "true" can be helpful here, at least in troubleshooting - let X start, then read the log file in /var/log/Xorg.0.log - this will probably tell you what is going wrong and how to correct it. Its an art
Remember when you are in a "graphics" mode, even if it isn't working properly, you should be able to hit CTRL-ALT-F2 to get a text console you can login at and perform these changes/checks. There is a Wiki article describing how to login under all circumstances, as there are for many of the things I have described above.
Hope this helps. Keep us updated.