Aspire L320 overclock

Hi. Im new and i wan to increase my computer speed and if possible, graphics. Can you guys help me?
My computer is the Aspire L320 from Acer. My GhZ is 1.8 and is it possible to overclock it to 2.4ghz without buying a cooler?

I have to put these in two posts.
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System Information
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Time of this report: 11/11/2009, 18:21:45
Machine name: JIAWEI-PC
Operating System: Windows Vista™ Home Basic (6.0, Build 6000) (6000.vista_gdr.090805-0102)
Language: English (Regional Setting: English)
System Manufacturer: Acer
System Model: Aspire L320
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: Intel(R) Core(TM)2 CPU 4300 @ 1.80GHz (2 CPUs), ~1.8GHz
Memory: 1014MB RAM
Page File: 992MB used, 2976MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10
DX Setup Parameters: Not found
DxDiag Version: 6.00.6000.16386 32bit Unicode

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Display Devices
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Card name: Intel(R) 946GZ Express Chipset Family
Manufacturer: Intel Corporation
Chip type: Intel(R) GMA 3000
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_2972&SUBSYS_0CBE105B&REV_02
Display Memory: 251 MB
Dedicated Memory: 0 MB
Shared Memory: 251 MB
Current Mode: 1680 x 1050 (32 bit) (60Hz)
Monitor: Generic PnP Monitor
Driver Name: igdumd32.dll
Driver Version: 7.14.0010.1214 (English)
DDI Version: 9Ex
Driver Attributes: Final Retail
Driver Date/Size: 2/22/2007 09:48:08, 2363392 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B78E66-6A32-11CF-5577-B42CA3C2CA35}
Vendor ID: 0x8086
Device ID: 0x2972
SubSys ID: 0x0CBE105B
Revision ID: 0x0002
Revision ID: 0x0002
Video Accel: ModeMPEG2_A ModeMPEG2_C