Recherche drivers

Bonjour,
salut a tous
j'ai recuperé un pc qui doit me servir de tuner TV et qui sera branché via composite sur la télé.
le probleme c'est que je n'arrive pas a mettre plus que 640*480 avec 16 couleurs (y)
je pense qu'il faudrait que j'arrive a mettre a jour mes drivers de la carte graphique et de la carte mère mais je ne les trouve pas.
voici ma config:
[code]Computer
Operating System Microsoft Windows 98 SE
OS Service Pack [ TRIAL VERSION ]
Internet Explorer 5.00.2614.3500 (IE 5.0 - Windows 98 SE)
DirectX 4.09.00.0904 (DirectX 9.0c)
Computer Name G6J3K6
User Name jerem
Date / Time 2007-12-26 / 10:46

Motherboard
CPU Type Intel Pentium III, 450 MHz (4.5 x 100)
Motherboard Name Abit BE6 (2 ISA, 5 PCI, 1 AGP, 3 DIMM)
Motherboard Chipset Intel 82440BX
System Memory [ TRIAL VERSION ]
BIOS Type Award Modular (06/11/99)
Communication Port Communications Port (COM1)
Communication Port Communications Port (COM2)
Communication Port ECP Printer Port (LPT1)

Display
Video Adapter Standard PCI Graphics Adapter (VGA)
3D Accelerator ATI Rage128 GL AGP
Monitor ImageQuest Q910 [19" CRT] (130820030217)

Multimedia
Audio Adapter Creative SB Live! Value (CT4830) Sound Card

Storage
IDE Controller Intel 82371AB/EB PCI Bus Master IDE Controller
IDE Controller Primary IDE controller (dual fifo)
IDE Controller Secondary IDE controller (dual fifo)
Storage Controller HighPoint Rocket 100 Controller
Storage Controller HighPoint Rocket 100 Controller
Floppy Drive GENERIC NEC FLOPPY DISK
Optical Drive AOPEN CRW1232 (12x/10x/32x CD-RW)
Optical Drive GoldStar CD-ROM CRD-8400C (40x CD-ROM)
SMART Hard Disks Status Unknown

Partitions
C: (FAT32) [ TRIAL VERSION ]
Total Size [ TRIAL VERSION ]

Input
Keyboard Standard 101/102-Key or Microsoft Natural Keyboard
Mouse HID-compliant mouse

Network
Primary IP Address [ TRIAL VERSION ]
Primary MAC Address 00-A0-24-84-81-6E
Network Adapter Fast Ethernet Adapter (192. [ TRIAL VERSION ])
Network Adapter PPP Adapter.

Peripherals
USB1 Controller Intel 82371AB/EB PIIX4 - USB Host Controller
USB Device USB Human Interface Device

DMI
DMI BIOS Vendor
DMI BIOS Version Award Software International, Inc.
DMI System Manufacturer
DMI System Product
DMI System Version
DMI System Serial Number [ TRIAL VERSION ]
DMI Motherboard Manufacturer
DMI Motherboard Product i440BX-W83977
DMI Motherboard Version
DMI Motherboard Serial Number [ TRIAL VERSION ]
DMI Chassis Manufacturer
DMI Chassis Version
DMI Chassis Serial Number [ TRIAL VERSION ]
DMI Chassis Asset Tag [ TRIAL VERSION ]
DMI Chassis Type
DMI Total / Free Memory Sockets 3 / 2[/code]

aidez moi svp!!