We don't have the maps or ancillary files on this site anymore so it's not easy to give you specific advice and i cannot help with download sources for that reason. However, as far as i can remember <any_name.img works in both Garmin and Map folders on microSD for 37x0 series. Certainly gmapsupp.img will work in Garmin root folder of the card. As well as the correct ASR (1) files for the map version, as i mentioned before you need the Italian language SRD file but only on the device internal memory in ASR Folder. The ASD map files can go on the card however. ASR files are also issued in a later compilation for other devices (from 34x0 onwards from memory) and it is known as "ASR (2)" which won't work in 37x0 devices.