Unable to burn using a LG GSA H58N DVD bur...

With the built in drivers for windows XP it can identify and use DVD-RW facilities of DVD burner. However depending on your bios your machine can fail to burn DVDs if your bios can not recognise that output.

While loading the CD that comes with the DVD-RW did you get an error message if yes then it means you BIOS is failing to recognise your DVD-RW as an output method try to update the BIOS. But before you do that if you can try adding the drive on a modern (after 2002) machine with xp and see if it can burn DVDs there without adding any drivers.

if it fails on that other machine then you can be sure its not your BIOS but a problem with drive (which I suspect most actually). But if it works then then you need to update your machine bios.