What im about to ask may sound lame
but when using Norton Speed Disk (disk defragmanter)
you can specify which files to place first, last etc etc
Wouldnt it be some kind of the same that FFXP needs to be able to download files according to a priority list ?
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Edited from here
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Or maybe its somehow possible to make a custom list/sort order in the FTP/Local tree windows where *.nfo is listed on top, that way it will always be #1 in que/transfer.