Should give you the information you are looking for. If you are running FC5 and are updated on all your packages you should probably have version 2.8.20-1.
What you are most likely missing is the development packages to gtk which is what you need if you are compiling an engine from source instead of installing from rpm.
Try the following as root:
# rpm -q gtk2-devel
If nothing is returned do:
# yum install gtk2-devel
When you are finished, try running ./configure again from the directory you uncompressed the UbuntuLooks package. You may find additional errors, if you didn't have the gtk2 development libraries installed you may need to install other development packages as well. The fastest and easiest way to do this is to use the Add/Remove Software application from the Gnome Applications menu. Select the Development packages (defaults should be fine) and you'll be in business.
As far as hardware goes, it depends on how much info and what kind of info you are looking for. You can use the output of dmesg to give you information parseable by grep. Additonally, if you want a graphical tree look of your system, run hal-device-manager from the command line as root. This will give you more information than you might ever want to know about your system.
Have fun customizing your desktop!