When I first got my current computer no distro would install on it. The first
one to work was SimplyMEPIS. I used boot parameters to get it to work. At the
bottom of the grub menu of the Live CD is a narrow window where you can type and
add boot parameters. Two boot parameters for video problems were vga=normal and
xdrvr=vesa. Do not add commas between them, just leave a single space. After
entering them you can press enter. If the Live CD boots and works with these
settings then we know that this is what you need to use for your video problem
and will write them into the settings.

I am not a modem guy. I once was, but have not used a modem for over ten years.I
am hoping that someone will jump in with suggestions for you. Networking is not
as good with Ubuntu as some distros.

Have you considered trying Linux Mint which is an Ubuntu derivative that has
some great tools, including a networking one? It is nice looking and Elyssa, the
version based on 8.04, is just out (Gnome and Lite, so far). There will be KDE,
Fluxbox and XFCE versions to follow. Another one to consider is Simply MEPIS 7
which is based on Debian stable and it has great tools, including a networking
one. Neither of these is wandering far from Ubuntu as all three are Debian at
their core.

While I use and like Ubuntu, my biggest criticism is that the persist in
thinking that Gnome and KDE out of the box tools are sufficient, but other
distros such as the ones mentioned plus openSUSE, Mandriva and PCLOS have
expanded tool sets that add functionality and simplify everyday tasks. Your case
underscores the need for better tools.