Well, you could always upgrade.. LOL, and continue to tweak, and read up on how to optimize certain games, etc.. But yeah, I think that 512mb ram is probably hurting you, as well as the slow video card, One thing you could do is turn down the video card settings to medium or performance.. and just play the games.
This is a good site to learn about tweaking games:
http://www.tweaktown.com/cat/guides/index.html
looks like that site has changed immensely since a few weeks ago- looks like it has been taken over by an ad machine and a web-store- not sure- but go down to where you see this list below and start reading up- there is a lot to learn from those guides that can help out.
Guides: Archive
2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | All
Articles listed in chronological order.
ALL archived articles for Guides [55 Articles found]
Data Backup Guide – Online and Hardware Solutions Examined
2006 Holiday Shopping Guide: Building a high-end Gaming PC!
Playing DivX and Xvid content on Xbox 360 – An easy guide!
Intel Core 2 "Conroe" Memory Settings Guide
Gadget Guide #1 – February 2006
Beginners Guide to installing Windows
PC Security Guide – Protection from Viruses, Attacks and Spyware
WinXP Tweaking: Protecting your PC from the outside world
Spyware and Adware Removal Guide – Speed Up and Free your PC
Microsoft Windows XP SP2 - Installation and Tweaking Guide
The definitive guide to benchmarking with DOOM 3
The Simple Antialiasing and Anisotropic Guide
Gizmos, Gadgets and Goodies Guide #4
ATi Catalyst Installation Guide
Gizmos, Gadgets and Goodies Guide #3
Gizmos, Gadgets and Goodies Guide – May 2003
Gizmos, Gadgets and Goodies Guide – April 2003
WinXP Tweaking: From Relax to Righteous
Game Music Extraction Guide
Battlefield 1942 Tweak Guide
System Optimization Guide for Gamers
Need For Speed: Hot Pursuit 2 Tweaking Guide
Unreal Tournament 2003 Tweak Guide
PC Buyers Guide - October 2002
AMD Overclocking Guide - October 2002
Unreal Tournament 2003 Demo Tweak Guide
America's Army: Special Forces Tweak Guide
Windows XP SP1 – Updating Tips ‘n’ Tricks
PC Buyers Guide - September 2002
Obtaining DDR333 from EPoX 4G4A+
WinXP Tweaking: From Reformat to Relax
The Elder Scrolls III: Morrowind Tweak Guide
PC Buyers Guide - July 2002
Beginners Guide to Overclocking nVidia Video Cards
Creative Audigy Drivers - Installing without the CD
PC Buyers Guide - 11th May 2002
nVidia Graphics Tweaking Guide
PC Buyers Guide - 29th April 2002
Heatsink Theory Guide
Windows XP Upgrade Guide
BIOS Tuning Guide
Windows XP Home Networking Guide
Tweaking Windows XP Part 2
Tweaking Windows XP - Part 1
Windows XP Activation
Broadband Connection Tweaking Guide
Registry Guide
AGP4x + VIA Chipsets Fix
Basic BIOS Tweaking Guide
WinME System Tweaking Guide
WinME Modem Tweaking Guide
Monitor Tweaking Guide
Intel FSB Overclocking Guide
AMD Overclocking Guide
Detonator3 6.50+ OCing