shesagordieBut, I question the wisdom of spending $200+ on an obsolete EOL DDR2, 530 MT that can be purchased for around $200.
Better to put the $200 towards buying a new, or used system that supports DDR3 RAM and at least a Quad processor.
The Vostro 200 will support an aftermarket board, but an opening would have to be cut out for the IO shield. Furthermore, if the case is anything like the Vostro 220s, there will be fixed CPU mounting bosses that must be ground off to support newer CPUs like the Core i5.