Awesome... I opened a beer just for you.... now backup
Your wireless adapter looks to be on-board and I didn't see any mention of the its type in the spec sheet. Your motherboard is manufactured by Asus as an A8N-BR and HP renames it Pyrite-GL8E. Not too much information is available on them
When I start looking for a driver I begin with finding out:
1. Manufacturer Name
2. Model Number
3. Version
5. Vendor ID
6. Device ID
Seeing how we don't know the manufacturer of the wireless adapter on your motherboard we can try to find it by finding the device & vendor IDs first.
I would download DPCI Manager here:
http://duddie.kazzuya.com/proj/DPCIManager_01.zip This tool allows you to find the Vendor & Device IDs
It will show you something like this:
For example the numbers on the left in the first column are the Vendor IDs and the numbers on the right in the first column are the Device ID. Find your wireless card's vendor & device IDs
See if you see any reference to a wireless adapter and post everything on that line. Ive talked to a few people who had onboard wireless and few were able to get it running and had to go the PCI card route. You should have one free port on your motherboard. Alternatively it might be a bit easier to get your wired connection up and running.
VIDEO
What about video? When you go to the apple in the top left corner of your screen and choose About this Mac then More info. what does it say under graphics/displays?