Restoring an HP Pavilion a706n

Back in the video where I made a pre-built Lenovo desktop into an XP gaming PC, I mentioned starting work on a completely different computer from the Windows XP era. I also mentioned how I didn't do my homework on that computer before I blindly took on the project.
But now is the time for this computer to shine! This HP Pavilion a706n desktop was on its way to being e-cycled, but I jumped in to give this (admittedly average) desktop a second lease on life. While not as powerful as I was hoping when I first took on the project, it'll have enough power to handle games from the late '90s.
I hope to feature this PC more on the channel for PC games that can run on Windows 98, 2000, Me, and (some) XP.
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Featured game: Microsoft Combat Flight Simulator 2: WWII Pacific Theater
The computer:
CPU: AMD Athlon XP 3000+ 2.1GHz
RAM: 1.5 GB
GPU: Nvidia GeForce 256 (32MB)
Storage: 40GB IDE HDD "Spinning Rust"
Optical: DVD ROM combo drive
Music:
"Title Theme" - Super Mario 64
"Busy City", "Confident Kurt", and "Smokey's Lounge" - by TrackTribe
"Naked Glow" - R4: Ridge Racer Type 4
"Machine Test" - Gran Turismo 3: A-Spec
"Canal 3" - by Quincas Moreira