blackberry deployment and release process

So I'm building a blackberry app and was wondering if there is any good documentation on deployment/release best practices? Blackberry's "A70 – How to Deploy and Distribute Applications" document is kind of lacking.

I guess I'm looking for answers for the following question (Specifically for Over-The-Air aka OTA):

1. I'm building an app for OS 4.5 and up. Do I need to compile a separate COD/JAD for each version? (i.e. 4.5, 4.6, 4.6.1, 4.7, and 5.0)
2. How do I detect OS version from the user开发者_StackOverflow中文版-agent?
3. What's the best way to compile COD/JAD files?
4. anything else that might be good to know :)

Thanks in advance!

---

1. No you don't need to compile a separate cod file for each version although my understanding is that OS 5 will run older applications in a compatibility mode which can mess things up so you may want to compile separately for that if there are any problems.
2. According to Wikipedia the user agent seems to follow the format "BlackBerry / Profile/..."
3. I'm really not sure what you're looking for here. As far as I know the rapc compiler doesn't have any optimization abilities so however you compile it it's going to produce the same result.