You should throw that CD in the bin and get a copy of real Ubuntu. Nobody here will be able to support a respin of Ubuntu with some unknown desktop; I can tell you how to launch programs and the Terminal on regular Ubuntu, but I've got no idea on your strange copy.
You say it's based on Ubuntu 11.04 or 11.10? Both those versions are out of support, or will be unsupported in a month. The latest version of Ubuntu is 12.10, I suggest you try that.
The only operating system that can run Windows programs is Windows. Even if somebody makes Ubuntu look identical to Windows, does not change what it is underneath.
Libreoffice is merely Openoffice.org with a couple of new features. Libreoffice has exactly the same code as Openoffice, but with extra things added.
There is no "standard script" for installing anything that's not in the repositories (Ubuntu Software Center). You can add extra repositories to an Ubuntu system to get to the software you want. That's how you install software on Ubuntu, not by downloading programs from a website.
It sounds to me like you're looking for, basically, Windows XP for free without viruses. This is not what Ubuntu is. Ubuntu is an operating system designed to be easy-to-use and powerful, not to ape Windows. If you want to use Ubuntu, you will have to learn some things that are different. Ubuntu is not difficult, it is merely different. If Ubuntu was anything like Windows XP, most people would not want to use it.
My recommendation is: If you want Windows XP, install Windows XP. If you want to try Linux, try a real Linux distribution instead of something that's pretending to be Windows. I recommend you try Ubuntu 12.10, and once you've tried it and experimented you will probably be able to answer your own questions; if you're still stuck, you can ask for help.
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.