Oh, I thought you were going to persist in trying to game with THAT setup. That was a no win situation.
More RAM is your first step. Cheap RAM can be found anywhere. Good RAM is a little more involved.
Go to
www.crucial.com and input it there and you can see EXACTLY what you need. Speed is not the only factor, especially on older machines.
They also have an online scanner if you do cannot find your MB. On obscure brands this is sometimes the case.
System Requirements with problemareas highlighted:
Minimum System Requirements Operating System: Windows XP/ME/2000/98 (Windows 95/NT not supported)
CPU: 500 MHz Intel Pentium III or AMD Athlon processor
RAM: 128 MB
CD/DVD-Rom Speed: 8X
Hard Drive Space: 1 gig plus space for saved games
Video: [highlight]16 MB video card[/highlight], DirectX 7 compatible
Sound: DirectX 7.0 compatible
Input: Keyboard, mouse
Recommended System Requirements CPU: 1 GHz or faster
RAM: [highlight]256 MB or more [/highlight]
Video: [highlight]32 MB or greater supported Direct 3D video card [/highlight]
Your onboard graphics adapter is not good even for simple gaming.