I have the LG 4167 multi format dual layer DVD burner. Not lightscribe but at the moment Lightscribe can only print black not colour.
I use my R200 to print direct to CD/DVD using printable media.
Of course, if you buy a lightscribe burner you can still use ordinary printable CD/DVDs in it and print the labels on your R300. Lightscribe disks (from what I can see look to range from about 30p to 70p each depending where you get them). click here
And, of course, all DVD burners will burn to CD as well. You need up to date DVD burning software as well. If you have early versions of Nero, Roxio or use the built in XP burner they may not support DVD burning.
I am using Nero 22.214.171.124 from:
click here make sure you get OEM Suite 3