There are 3 files that you will need to download..even with limited bandwidth, I don't think they will be too bad.
lua51.dll - 339KB
zlib1.dll - 105KB
libmysql.dll - 2.4MB
You may (probably) have the lua51.dll and libmysql.dll already..but, the zlib1.dll is necessary for recent changes.
(Check you dependencies folders for the lua and mysql dlls..)