New system using old parts

[Tiget]

Hello. I want to build a pretty much new system, but if possible use some of my older system's parts aswell to save money.
This is my current system:
Time of this report: 6/21/2009, 21:18:05
Machine name: YOUR-515E7D85B6
Operating System: Windows XP Home Edition (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.090206-1234)
Language: English (Regional Setting: English)
System Manufacturer: INTEL_
System Model: D945GCZ_
BIOS: Default System BIOS
Processor: Intel(R) Pentium(R) 4 CPU 3.00GHz (2 CPUs)
Memory: 2046MB RAM
Page File: 1093MB used, 1555MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.5512 32bit Unicode

Display Devices
---------------
Card name: ATI Radeon HD 3850
Manufacturer: ATI Technologies Inc.
Chip type: ATI Radeon Graphics Processor (0x9505)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_9505&SUBSYS_25421002&REV_00
Display Memory: 256.0 MB
Current Mode: 1440 x 900 (32 bit) (60Hz)
Monitor: Default Monitor

Sorry if that is too much/too little information, I do not know much about hardware .
I heard someone talking about buying another graphics card of the same type and linking them together or something, would that be a good idea?
I would use the new system to play games like LotRO on the highest settings.
Thanks,
Tiget.

 

[Atomic Rooster]

A little more info would help. Things such as hard drive size and interface type (IDE or SATA), memory type (DDR, DDR2) and video card interface such as AGP or PCI Express.

A couple of nice little apps that can tell you more about your system are PC Wizard and Belarc Advisor