Что делать, если Ubuntu в упор не хочется запускать инсталлятор?

Как вариант, попробовать альтернативный инсталлятор:

Alternate install CD

The alternate install CD allows you to perform certain specialist installations of Ubuntu. It provides for the following situations:

setting up automated deployments;
upgrading from older installations without network access;
LVM and/or RAID partitioning;
installs on systems with less than about 256MB of RAM (although note that low-memory systems may not be able to run a full desktop environment reasonably).
In the event that you encounter a bug using the alternate installer, please file a bug on the debian-installer package.

Источник: http://releases.ubuntu.com/lucid/