or if you want to use it like another HD use DirectCd or some other packet writer, then you dont loose 100 mb but a lill less but you can write in pieces
Note: not all computers support UDF reading
UDF: packets shit
so it could happen that you burn your cd with UDF writing and close it but that it doesnt works at a friends place.
(Newer CD-readers can read it and all CD-RW-readers/burners too)