I don't want to tell you anything wrong (so read your manual first)but generally to replace an excisting AGP card you would first remove the present cards drivers (add & remove programs) this is not applicable if the drivers being used are Generic (out of windows driver list) if you don't see graphics drivers on the Add/Remove list then you don't need to remove them.
After you have done this shut down, unplug, and physically swop the two cards. Restart, the system should plug and play the new card, you direct it towards the drivers in the CDrom and away you go!
A sound card add on maybe slightly more difficult in that if it is onboard sound (it doesn't have a sound card in a slot) you usually have to go into the bios screen setup
(this is done by hitting the delete button in most cases on initial boot) and disable the onboard sound, as simple as clicking on the icon and changing it from enabled to disabled and saving changes when you exit.
Turn off and disconnect the PC, fit the PCI soundcard into a spare PCI slot, reboot, plug/play point towards software driver in CDrom.
Before you do any of this, check you have the necessary upgrade slots and read your manual to make sure.
It maybe easier just getting one stick of 128 or 256 ram but perfectly possible to put another 64 next to the one you have if you can get the correct type. Go to somewhere like Crucial.com as they will be able to supply you with the correct upgrade type for your system.
Martin Vote if you found this post helpful please!!
