yes it is - download File Manager for Android Wear
https://play.google.com/store/apps/details?id=com.woiapp.filemanagerwear
transfer files from /sdcard/beautifulwatches/images and /sdcard/beautifulwatches/watches folders
file should have same names and copied to same locations on watch/phone
i have tested this on samsung gear and moto 360 and it does work