Simple question re. installing graphics card

I would first uninstall the current drivers for your NVidia 64 MB card.  Then shutdown your system, detach all cables, ground yourself using a wriststrap, or at least touching metal part on your computer, then switch out the two cards, close system, reattach cables, boot up, let XP detect your new FX card, and cancelling out the new hardware wizard if shows up, then use the CD to install the drivers for the FX card that came with the card.  (You can also first download the new FX drivers from NVidia's site prior to doing anything else and just do not run them until you have actaully installed the new card.  Choice is yours-saves a step or two.)

After your system is recognizing the new card, I would then go to NVidia site and download the latest 50 series drivers (which ideally are for the FX line of NVidia cards), if they are not the ones that came on the CD with the new card (most likely not).

I prefer to use drivers from NVidia's site as opposed to the ones at Dell, but it your preference.  Sometimes you will not get all of the features that are available for your video card when using the Dell drivers.

Some also use the driver cleaner available at post in top of forum, but I have never used that when switching out NVidia to NVidia cards, only then switching to ATI from NVidia, or vice-versa. 

Thanks Wrenda,

I followed your advice and changed over my graphic card and installed the latest NVIDIA drivers.

My appreciated

Fosco

You're welcome Fosco.  Glad all went well for you.

Enjoy your new 4600 and new vid card.