Of course. Dell never intented to upgrade this system to windows 7, so it will not ever give you drivers.
The manufacturers of the internal components however might have drivers! So put in that tag number again and find out the exact type and version of the internal components! (Like Conexant modem, nvidia 4200, etc). Then go to the website of the manufacturer of that specific internal component and find out if they made windows 7 drivers for it.
If they don't have windows 7 drivers .. you're screwed..
If Dell put their own brand tag inside the internal component (they do that sometimes), then original manufacturer drivers may not work .. you're screwed..
Thing is, somebody had to write the drivers. Either Microsoft, either the manufacturer, either the company.. So if they don't, usually nobody will.