Add On Software for Blackberry?

I have a very weak playing program on my Blackberry.  I use it for studying openings (in player v. player mode) because the display is much better than a handheld chess-specific device I just bought.  I bought the new device because I wanted to be able to set up a position (instead of being forced to start from the opening position on my Blackberry).

Does anyone know of any add on software i can get for my Blackberry that will allow me to set up a position and play out subsequent moves?

Thanks much.

What type of berry do you have?

Blackberry 880.  I checked another thread on here after my post, and it looks like some people are happy with Odesys.  Not sure if it has a set up mode.