Display problems

[FlashHarry]

Right, this is all a bit complicated so bare with me...
I have a Win 98 SE PC that has a built in SIS 530 graphics card. About 6 months ago I installed a Creative CT 6954 PCI card, disabled the old card via the Device Manager in windows and was up and running. Recently problems have started to occur with the display, icons becoming corrupted and wider pixel drop. During the last two days the problem has become more serious in that the screen locks up, ctl-alt-delete does nothing and the only alternative is to pull the plug. It is now impossible to do anything in windows as the screen immeditately hangs after starting up
By rebooting in Safe Mode and using msconfig to edit system.ini, I found that by removing the line display.drv=pnpdrvr.drv I could reboot the machine in VGA and get out onto the net(this is how I'm talking to you). The boot.description section of system.ini seems fine i.e display.drv=Creative CT6954 but I'm wondering about the pnpdrvr.drv. I assume it stands for plug and play driver, but when i search for the file i don't seem to have one on my machine, should I? What does it do?
About two weeks ago I added a new hard drive, the installation went smoothly and I'm at a loss to see how this can have anything to do with it, but i suppose you never know.
Any help would be greatly appreciated as I stuck with a horrible, chunky, dog slow screen at the moment.

Yours
Flash

[canit]

Is the OS on the new drive now? Did you have to disable the onboard video using a jumper on the board or in the bios(or does your motherboard auto detect the add on video card)? Did you enable PnP(reset configuration data) in the bios(if the OS is on the new drive)?

[FlashHarry]

No, the OS is still on its original drive, there's nothin on the new drive yet. I didn't have to disable the onbard video by using a jumper, I just specified PCI as the primary display in the bios and windows auto detects.
Since my last posting I've managed to improve matters slightly. I plugged back into the onboard card, unistalled the PCI card's software and physically removed the card and rebooted. Windows detected the old card and everything was fine. I then reinstalled the card and the software and enabled the PCI card in the bios. Initially everything seemed back to normal but today the system has started to lock up again, particularly when I'm connected to the Net. Buggered if I know whats going on

PC is AMD400-k2 64mg ram M599lmr mother board, with onboard video & sound (not the greatest setup, I know, but it used to work fine)
If anyone has any suggestions I'm willing to try anything rather than reinstalling Win(* again.

Yours
Flash Harry

[canit]

Any conflicts in device manager? Are you using IE5.5? I tried it(with win98se) and found it really unstable-lockups, etc.

[FlashHarry]

No. IE is version 5.0. When you say 'conflicts in device manager' what sort of things should I be looking for?

[canit]

Start/settings/control panel/device manager then look for any yellow ! .

[FlashHarry]

The only yellow I can see is on my network card, but this has never worked and since my PC isn't on a network i don't think its important.
Is it possible that my CT6954 has developed a fatal fault? It did seem suspiciously cheap compared to other 32mg cards

[canit]

If your computer is never on a network, has a yellow ! beside it, and you're not using that nic for anything else remove it. Go into device manager/network adapter(my 12-05 post should have read; Start/settings/control panel/system/device manager)and remove it(the nic might be conflicting with your video card).