To run any command as the root user in Ubuntu, open a Terminal and type:
$ sudo <command>
Sudo will ask for your user's credentials (not the root user's - your current user account's password is what it'll want), then it will launch the program for you as the administrator.
For a nice GUI editor for the config file, I'd recommend gedit. Try this:
Applications -> Accessories -> Terminal
$ sudo gedit /etc/wvdial.conf
make your edits
save the file, and exit the editor...
Congratulations on your new broadband equipment! Keep us posted on how it turns out -
Obsidian Mini 9 >
2gb ram, 16gb ssd, bluetooth, 1.3mp webcam, us-intl kbd Internal Mods >
usb hub, 16gb flash drive, 8gb flash drive, added webcam, changed kbd Software Mods >
Dellbuntu 8.04.1 | Gentoo 2008.0