I have the same laptop.I installed 10.5.3 wireless didn't work.So i updated to 10.5.6 but i had problem with wireless not detacted and my mouse pad n keyboard did not function.could you where did u find the wireless driver or other drivers.
My onboard wireless didn't work but, I have a PRONET PN-54USB wireless usb adaptor which worked great out of the box.
About the keyboard and mouse problem, which installer did you use to install OS X? I am on iDeneb v1.3 OS X 10.5.5. I don't remember exactly but, I think I chose to install Intel chipset patch or package by selecting custom installation.
I am still on OS X 10.5.5 as I am typing this post.