Set gain on copy to device

[sterd71]

I use Strawberry over my collection of FLAC files.

For listening in the car, I build a playlist and copy it to a USB device.

The car can only play MP3 files, so I have the file format on the device properties set to MP3 to convert on save.

Problem is you lose the replay gain information when the file is converted.

Is it possible to set a default gain value for the conversion, so the resulting MP3's will play at the same volume?

Thanks
Steve