Will this work for you?
After finding the file, long press on it and choose "Open by..."
This is also hand down the best app I've come across for phone storage browsing/management, and as a bonus you can not only access your LAN (which I interpret is what you are doing when you mean messing with samba stuff?) but you can also hook it in with Google Drive, Drop Box, etc. Oh, and FTP stuff. Maybe other things I haven't tried, too.