No. If it had an AGP slot you could use that but if this is correct click here it has neither and the only option then would be a poor PCI graphics card but theres been 2 threads by people that I have seen who had Dells and bought PCI cards and found they wouldn't work so I don't think thats an option either.
I would open the case and look at the board and see if there is an AGP slot, if there isn't I would forget about it.
If he just wants the same display on 2 monitors you can get a splitter, but you cannot have 2 different screens using a splitter.
If you still want to have a go at it then this PCI card might do the job as it does have 2 outputs though you would need a convertor for the DVI output to make it VGA and you would need to check with someone - like Novatech that it will do dual display.
Before considering a PCI card phone Dell and ask if it will work.