Suggestions for new parts for latest gaming!

Hello,
I've had my computer for the past 4 Years and when I look back on the new games and try to play them, well... 3fps isn't a good sign

So I am looking for parts to replace. My budget is just under £250 but I want you to suggest parts that can cope with high settings of recent games (if possible :F)

My Current pc is this:

(I MIGHT BE GIVING TOO MUCH INFO BECAUSE I AM JUST COPYING AND PASTING FROM A SOFTWARE THAT DETECTED WHAT I HAVE)


SYSTEM INFORMATION

Computer Manufacturer-ASRock
Computer Model-G41C-S
Operating System (O/S)-Microsoft Windows 7 Enterprise Edition Service Pack 1
Operating System Build (O/S)-(build 7601), 32-bit
Operating System (version) -6.1.7601
System RAM-1.8 GB
CD or DVD Device- ATAPI iHAS122 B ATA
CD or DVD Device- YVI E7WPEBSDEF SCSI

CHIPSET INFORMATION

Chipset Software Status-
Intel® Chipset Installation File (INF) detected Intel® 6, 5, 4, 3, 900 Series Chipsets
Latest Version Available 9.2.0.1021

Detailed Chipset Information-Intel® Chipset Identification Utility

GRAPHICS INFORMATION

Graphics Product [1]-Intel® G41
3D Acceleration Yes
Hardware Transform & Lighting Support-Yes
Video Memory-766.5 MB
Vertex Shader Support-4.0
Pixel Shader Support-4.0
Microsoft DirectX* Version-11.0

MOTHERBOARD INFORMATION

Manufacturer-ASRock
Model-G41C-S
BIOS Version American Megatrends Inc. P1.10
System Memory 1.8 GB
Built-in Audio Driver Version 6.1.7601.17514

PROCESSOR INFORMATION

Manufacturer Intel-Model-Pentium(R) Dual-Core CPU E5700 @ 3.00GHz
Intel Processor analysis tools- Intel Processor analysis tools
CPU Speed-3.0 GHz


Thanks for any help and please do suggest on improvements please ^^