Here is how the data files contained in this package were produced:

1) Download ftp://ftp.fruitfly.org/pub/download/compressed/dmel_release5.tgz
   (47M) and extract in the DOWNLOAD dir.

2) Shell commands:

   R CMD INSTALL BSgenome.Dmelanogaster.BDGP.Release5

3) R commands:

   library(BSgenome.Dmelanogaster.BDGP.Release5)
   file <- system.file("scripts", "comments.R", package="BSgenome.Dmelanogaster.BDGP.Release5")
   source(file)
   buildDataFiles("DOWNLOAD/Dmel_Release5", "DATA", Dmelanogaster@source_files, "na_", ".dmel.RELEASE5", comments)

