Could i add anything to my dying pc or is it done for?

Before you scroll down and laugh at my shameful computer the question i'm asking is do you think it would be possible to add anything to this rig/Analytical Engine to enable me to play games such as battlefield 2142 with no problems. I got it built around the time half life 2 was out and it worked pretty well at the time, i had never seen graphics like it. Over time it has obviously got dated. In the not so distant future i will be buying a new computer but at the moment i only have a couple of hundred pounds to spare and i can't stand to sit here and do nothing. Could i add some ram and a new graphics card etc or is it to ancient to even do that. Once again i hang my head in shame, any response will be appreciated, thanks alot.

CPU

You Have: AMD Sempron(tm) 3000+

CPU Speed

You Have: 2.00 GHz Performance Rated at 3.00 GHz

System RAM

You Have: 511.5 MB

Operating System

You Have: Microsoft Windows XP Professional (Build Service Pack 22600)

Video Card

You Have: RADEON 9200 SERIES (RADEON 9250/9200 Series AGP (0x5964))

Video Card Features - Minimum attributes of your Video Card

Video RAM: Required - 256 MB , You have - 128.0 MB

Video Card 3D Acceleration: Required - Yes , You have - Yes

Video HW Transform & Lighting: Required - Yes , You have - Yes

Vertex Shader Ver.: Required - 2.0 , You have - 1.1

Pixel Shader Ver.: Required - 2.0 , You have - 1.4

DirectX Version

You Have: 9.0c

Sound Card

You Have: C-Media Wave Device

Sound Card Driver Version

Your driver version number is: 5.10

Free Disk Space

You Have: 81.5 GB

PASS

DVD

You Have: TSSTcorp CD/DVDW TS-H552B

PS. Sorry to make a thread out of this, I'm sure you're really fed up of these (is my pc good enough) type questions but i'm desperate.

what kind of mother board do you have?

what are you looking to do?
do you want to play games or just make your computer faster?