Thats what I'm talking about!! And just what I was thinking but I didn't know if the mobo would support the SSD or the extra Ram.I know SATA is the type of conection and from what I have read this computer used ATA devices. So you are saying that this SATA controll card will work with the mobo
I looked at the specs and your computer has only two memory slots, so your maximum RAM is two 1 GB modules. There are three PCI slots and you can stick a PCI SATA controller card in one, but I am not sure if you can boot from it. You need a BIOS which can boot from add-in cards and I do not see this option in the BIOS menu listed in the service guide for your computer. It might work, it might not.
Anyway, this is a good example of how OEM computers are hard to work with and hard to upgrade. Your best option at this point would be to sell the P4EE and to get a much faster new computer with enough RAM and the right set of interfaces for modern parts. Even a piddly little LGA1150 Celeron is going to be much, much faster than the P4EE, support more than enough RAM (and 64 bit operation, which the P4EE does not), and let you use an SSD easily.