eMule FAQ

eDonkey versions prior to .47 use an eMule compatible part system whereas versions post .47 split the temporary downloads into many individual files.

For the old version of eDonkey simply point eMule's folder for temporary files to the same one that has been used in eDonkey, or move the partfiles to your eMule temp-folder when eMule is not running.

Newer versions of eDonkey and Overnet use the split part-system. An "old style" option is available in those clients, which just makes the temporary download to be a single file - the part.met file is still in a new and incompatible format.
eMule v0.30c introduced a convert function to import external partfiles to your eMule downloads. It imports the old fashioned format (eMule, eDonkey =.47) as well as the split format and the "old style"-format of >.47 eDonkey/Overnet clients. The non-eMule formats will be converted to the eMule format.

You can access the import function from the Hotmenu (press Alt+X) or from the Tools icon. All you need to do there is to specify a folder containing the partfiles. eMule will try to convert the partfiles automatically and add them to your downloads on runtime.