Sometimes it is feasible to get some parts of a large file faster than others for example if you want to start watching a movie with for example vlc while downloading it!

Therefore I suggest that all sections are "grouped" around the first 25% of a file, then 25-50%, 50-75% and finally 75-100%

Using this method will make sure you can start watch a movie or listen to a soundclip much faster since you don't have to wait until the entire file is downloaded to have for example the first 25% of it fully downloaded. This is not possible now since the segments are spread all over the file.

Otherwise thanks for a great download manager! And thanks for releasing it under the GPL