Can I use eMules files and settings and vice-versa?
Most of them yes. The only ones you can’t share between aMule and eMule are the program configuration (that is, preferences.ini in eMule and ~/.aMule/amule.conf in aMule). All the ED2K network related files can be successfully shared between the two applications with no more effort than copying the files in ~/.aMule to the eMule’s directory and vice-versa. But have in mind that some files in ~/.aMule are aMule specific, such as amulesig.dat or aMule.tmpl, so it’s better to only move those files that are in both the aMule and the eMule directory. Moving half downloaded files is easy: just move them from your eMule temp directory (by default C:\Program files\eMule\Temp) into ~/.aMule/Temp or whatever your temp directory is in your aMule configuration.