arunchowdhary,

If I understand you correctly you are trying to connect n800 to your PC xp.
If that is what you are trying to do then.
You will need to install TightVNC on your PC with xp, get it here:

https://garage.maemo.org/frs/downloa...N800_armel.deb

Install instructions are included and very easy.
Then on the n800 you will need VNC viewer, install directly from Application manager.
The most important part is getting IP address of PC machine and n800. Set up password for both and you are up and running in a few minutes. This setup will not play audio or movie files for that you will need other apps, look in these threads for help with that. I have not attempted that yet.
Hope this helps, Dan