PC2-5300 correct. Upgrade to 2x1GB = 2GB of memory.
The link will show you how to change the memory. Some Dells have both memory slots on the bottom and some have the memory slots 1 on the bottom and one under the keyboard. This video shows you how to remove the keyboard if need be.http://www.memorystock.com/memory/viewvideo.asp?systemtype=Dell+Laptop&Class=Laptop