As far as I know there is no special tutorial about implementing OSM map display or other things inBlackberry applications.

But when you want to implement, I assume that you have enough programming skills to have a look at other OSM using open source software. There are plenty listed in the OSM wiki.

Have a look at their methods to deal with OSM data or rendered map tiles, and implement that in your app you are programming.

This is the only hint that I can give you so far.

If you have a specific question about one specific app (how it works), then don’t hesitate to ask here in detail, maybe we can help further.