Simple tutorial for establishing wi-fi connection between ppc and winx

I have done it in the past, but for the last 2 weeks i am trying again, but no luck this time.

I have:
- HTC P4350 with Windows Mobile 6.0
- Windows XP
- Siemens wired ADSL modem
- Linksys wireleess-g usb network adapter

Bout my problem... I know it HAS a solution, because i did it a few months ago.
Now i am stack with my head hitting the wall...

Anyway, here it is:
My pc connects to Internet through a wired ADSL modem (with the LAN port).
I have also bought a wireless adapter from Linksys, which i connect it through the USB port, to my pc.
From my wi-fi ppc, i want to view my shared files on win xp, with the help of the wireless adapter. I also want my ppc to recognize my internet connection from my pc (using Internet Connection Sharing), and access web pages.

I need a simple tutorial, just 1 simple page with the settings that i should make on the ppc and in Win XP.

Whenever i try to do some connection with my ppc and my pc, i lose my real dsl connnection from the modem. By that, i just mean that running Internet Explorer in my pc, does not load any web page. I have to restore my win xp system in order to load web pages.

Another thing i read somewhere. The IP of my ppc becomes 168.x.x.x and not 192.x.x.x I read that this means the connection with the wireless adapter is not correct.

I just want to see my pc files, from the HTC.
I am not asking for something big, just one page simple tutorial with the settings i should make.

Any simple tutorial would be greatly appreciated.
Thanks AGAIN.

MANY THANKS for your work, keep going, hope to hear from someone real soon,
a desperate user,
Ioannis