Remote desktop, XP home, installation, setup

Hello

I went through a dozen of websites and apps description on the net to find a tutorial or explanation about how to install and setup an android app to control your pc remotely (gmote, phonemypc, rdp,...).

But without success.

Is there any (complete and working) tutorial somewhere?

The problems & open topics are:
- usually if you have XP home you are stuck because there is no remote desktop (only for XP professional and upper versions). Nevertheless, when reading comments of people who have tried one of these apps, it looks like that a lot of XP home users have successfully installed the app. How? Mystery...

- the IP address: there are either tutorials with an 198.168.x.x IP address or with an Y.Y.Y.Y IP.
If you have an 198... IP, then you are local and probably by wifi. What is the point of using wifi at home to control your PC? Are you too lazy to stand up and go to it?
And if you use a "showmyip.com" website to get your network IP, the apps (sofar for me) could never connect to the server on the PC with this IP. So does anyone know how to solve this point? (ports are open, no firewall issue)

- Finally I need an install tutorial to be able to control my PC with an app (free possibly) with detailed steps and IP/setup examples.
Has anyone an idea where to find some?

Thanx!