Hi Nanook!
Being a Napster-compatible client WinMX uses the same method as Napster for identifying the content of each file being shared. This method, known as MD5 algorithm, calculates a specific identification (hash) number for each file, and even a smallest change in the file (like changing one letter of the artist or album name in the ID3 tags) changes the identification number. To allow resuming WinMX requires not only an identical filename and filesize but also a perfectly matching identification number. This number you cannot see directly from WinMX's search results so you have to rely on the software to recognize the files that actually are valid sources for resuming.
Morpheus uses a similar method but I think Morpheus does not care about filenames at all when picking up sources for multiple-source downloads and resuming. To my knowledge it relies on content identification (hash) numbers alone.
- tg
