Start CMP2, look for class 159 and right click>Edit in Explorer. Open class 159's config file and look for a line like this in the first paragraph:
interior <kuidx:xxxxx:xxxxx:x>
Copy the kuid number only, now search for your train without the cabview and open for edit in explorer as well. Open the config file, and replace whatever kuid is in the interior line with whatever you just copied. Commit both and you're good to go. The pointy brackets must surround the kuid.
Cheerio,
Nicholas.