laserjim2
The key is: DON'T make him feel like you're ignoring him or don't value his contribution (even if you don't). Just give him some time to cool off and don't pester him.
From your perspective, you might loose a couple of weeks, but at least you won't loose a valuable team member.
Database people can be especially finicky in this way (I would know, I'm a database person :) ). As far as I can tell, he just wants to feel like the company is also striving for the objectives he values. Let him work on those objectives for as long as he wants, but I'm relatively sure it won't be more than two or three weeks. He'll finish whatever is bothering him, and he'll want to get "more involved" again, which is when you start asking him with database help on your other projects.
If you're going to download it manually, you're going to specify the jar on your classpath, use com.breve.bre.BRE as the entry point, and specify the first argument as "com.breve.core.Breve"
The final command looks something like this: java -cp BRE.jar com.breve.bre.BRE com.breve.core.Breve