You don't say why you can't get past the resolution screen. If it is displaying OK on your LCD what is the problem? Do you mean that you choose a resolution that should work, but it comes up with a black screen for a while then reverts back to the original resolution screen?
If yes, then as rrambo says, you are having video driver/configuration issues.
1. Try the CDs instead of the DVDs - the CD's run a full build and so can cope with a wider range of hardware than the DVDs that are based on a specific piece of hardware and rely on pnp to correct the differences; or
2. Install a video card that is noted in the Wiki as working and try again; or
3. You will have to tinker with your /etc/X11/xorg.conf file - when you get the black screen X (windowing system) is trying to start with the resolution you chose, and either it can't handle your video hardware, or the default parameters it uses are not compatible with your screen, so a fails back. Have you tried lower/higher resolutions? Also, you may have to track down the right version of your video drivers and install them manually. in xorg.conf there is a (possibly 2) line(s) that say 'Options "UseEDID" "false"' you could try changing this to true. If your TV is well behaved it should report all the parameters it supports so that X can calculate a compatible screen mode for you. OR it could screw it up even further if your TV is badly behaved! But its easy to reverse.
To install stuff manually from the command line, you can hit CTRL-ALT-F2 and login. There are Wiki articles you can search for that tell you all the different logins and passwords you can use depending on your system, plus other that tell you how to install the drivers and edit the xorg.conf file.
Also, search for specific advice on this forum.
EDIT: PS. in the AV Wizard there are shortcuts to choose monitor output and resolution from the keyboard which can be handy. 1-5 chooses the output, 6-0 the resolution. When changing resolution or output from the keyboard or wizard, you have to wait at least 10-15 seconds before trying the next one as X has to shutdown, reconfigure and then start back up again