*stream, RwInt32 type,
Writes a chunk header to the stream.
stream Stream to be written to.
type Type of chunk to write. (Usually a user chunk).
size The size of the chunk excluding the header and type (should be multiple of four).
TRUE on success, FALSE otherwise.
This function can be used to add arbitrary data to a stream.
type should be rwCHUNKUSER+n where n is a number in the range (1 - 1000). All other chunk types are reserved for use by RenderWare.
bytes should correspond exactly to the number of bytes following the header, if this incorrect it will be impossible to skip over the chunk. bytes should also be a multiple of 4. This is important for platform independence where some architectures cannot access 32 bit quantities which cross 32 bit boundaries.