lol I got the editor name wrong, I knew it was Milk-something. Here's the link to their download. Yeah I was surprised it was still kicking, I played that mod back when it was still named Rebalance... that was like in 2006 or something >_>

Edit:
Their download is a zip, just remove the extra extension. All the ship stuff should be under \Data\Ships\.

Hmm, looks like Milkshape is free, last time I thought it was payware. I've got zero 3D skills though unfortunately - was thinking of concentrating on the scripts so I could add stuff like more quests. Break through system blockades, maybe some smuggling jobs to help your reputation, escort missions (I love those, they force you to look after the target), or even join in large system-wide engagements.