Problem Setting Up Wireless Internet & Wireless Nintendo Wii

Hi all,

I am having quite some troubling issues with my wireless setup (to be setup *more like it*).

Current hardware:
1. NETGEAR ProSafe 802.11g Wireless Access Point WG102
2. Telkom Wireless Router / Switch
3. Nintendo Wii (Wireless)
4. IBM Thinkpad T42 (Wireless)
5. Desktop PC With NIC

The current setup *See attached picture* "Setup"

So I have a 3G card working through PCMCIA on my T42 Thinkpad, which I use for internet connectivity.
I want to share my internet connection throughout my house.. to my desktop PC + Nintendo Wii...

I have tried setting it up myself, but i'm no expert whatsoever...

Questions came up like, which device will be setup as DHCP... originally, my Telkom Router/Switch was handing out IP addresses..
But then I couldn't share my 3G internet anymore because of the IP address change (when i share it, my laptop becomes 192.168.0.1).....

Could anyone help me please, I've been struggling for Months with this :-(

Not sure how to attach a picture on here, but It's on another forum already which did allow attachments.. So see the link for the pic of my current setup.

http://profile.imageshack.us/user/johndoe1983/

check the setup.jpg