batchfiles_0.6-{4, 5, 6}.zip are a bug fix releases.
batchfiles_0.6-0.zip is for R 2.12.0 and later.
batchfiles_0.5-0.zip and later have been tested on XP, Vista and Windows 7 and on both 32 and 64 bit systems.
batchfiles_0.4-0.zip has been tested only on Windows Vista.
batchfiles_0.3-2.zip and prior have been tested only with Windows XP.
For more information see home page.