|Your post is confusing. You don't format a drive to remove a partition. And neither partitioning or formatting have anything to do with drivers.|
If you'll post the model/model number of your Dell, someone should be able to point you to the correct drivers. You'll need them for the motherboard chipset, video, audio, network, wireless (if you have it), plus drivers for any external devices such as printers, scanners, cameras, etc. You'll also have to install SP3 if it's not included on your XP disc, plus ALL the Windows Updates, then you can concentrate on the other software installations.
However, if you have a SATA HDD, installing (or reinstalling) XP is not straight-forward. There are steps that will need to be taken to get the HDD recognized.
"Why not use a freeware like Double Driver to collect your drivers"
I don't know why anyone would use a "driver finder" program.