you can drag-and-drop (or copy and paste) files using windows explorer, copy them from the folder they are in to your dvd-rw drive then click copy to dvd
This may not work on all dvd players (depends on file format and if your dvd player suppors that file type, e.g wma dvd's mp3 dvd's ect)
tips:
-you can select multiple files that are spread out by holding ctrl and left clicking each one
-you can select all files in a folder by pressing ctrl+A
-hold down the shift key and click a file, then click another one (the two you clicked and all the ones in between will be selected
-copy selected files by pressing ctrl+c
-paste files by pressing ctrl+v
Hope this helps,
Mike