Hm, shouldn't take that long. Unless these sources connect only part-time and with switching IPs of course. Then the seeds won't help you either.
If you want to play with it just tweak in PartFile.cpp
void CPartFile::SaveSourceSeeds()
{
#define MAX_SAVED_SOURCES 10
// Kry - Sources seeds
<snip>
if (GetSourceCount()>20) {
return;
}
Increase the 20 to turn on the seeds feature for files with more sources.
Increase the 10 to save more seeds per file. (must not exceed 255! )