DOOM 3 Problem

[asher_friends]

hey guys,,,i am really frustrated as my Doom3 game is not running on my computer..whenever i try to insert the installation cd it shows me this dialog box...
"---------------------------------------------------------
16-bit MSDOS error
---------------------------------------------------------
H:\setup\rsrc\bin\autorun.exe
The NTVDM CPU has encountered an illegal instruction,
CS:0570 IP:7100 OP:c7 91 41 e8 1d Choose 'Close' to terminate the application
---------------------------------------------------------"
and these are my system specs...
------------------
System Information
------------------
Time of this report: 9/2/2006, 11:55:56
Machine name: HAA
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.050301-1519)
Language: English (Regional Setting: English)
System Manufacturer: INTEL_
System Model: D915GAG_
BIOS: BIOS Date: 04/29/05 21:08:57 Ver: 08.00.10
Processor: Intel(R) Pentium(R) 4 CPU 3.00GHz (2 CPUs)
Memory: 502MB RAM
Page File: 432MB used, 796MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.2180 32bit Unicode
---------------
Display Devices
---------------
Card name: Intel(R) 82915G/GV/910GL Express Chipset Family
Manufacturer: Intel Corporation
Chip type: Intel(R) 82915G/GV/910GL Express Chipset
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_2582&SUBSYS_41478086&REV_04
Display Memory: 128.0 MB
Current Mode: 1024 x 768 (32 bit) (70Hz)
Monitor: Plug and Play Monitor
Monitor Max Res: 1600,1200
Driver Name: ialmrnt5.dll
Driver Version: 6.14.0010.4421 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Please help me..i am really confused abt this...Please help me

[abhijit_reddevil]

Update all drivers of the display card, motherboard chipset, directx (latest release of 9c) etc.

May be that the RAM has become faulty. If you have dual channel RAM then try removing one of the sticks and try out. Also try other RAM slots.

[asher_friends]

Done all that...and after upgrading all things i have posted my system requirements..and i dont have dual ram...Only single 512 MB ram,,,,Please is there any thing u can suggest