Again not quite, if you wireless router is issuing IP's in the 192.168.2.x range then you should be ok...
If I recall correctly, Internet Connection Sharing issues IP's in the 192.168.1.x range...
So no conflict and it should all just work...
Not quite, you would have two networks running, one from your wireless router to you PC, and then another one from your PC to the wired router and the other devices connected to it...
You might need to change the IP address range that your wireless router is giving out to avoid conflicts, but...
Try disabling DHCP on the router, and then running the Internet Connection Sharing Wizard on your main machine.... That should get you up and runnng hopefully...