Unfortunately it's not possible to use heart rate monitors with Run.GPS Trainer for Blackberry since the Android on Blackberry does not support Bluetooth :-(
When I load up run.gps and try to connect to the HRM (tried both Polar bluetooth and Zephyr HRM) I get prompted to allow an application to access bluetooth. I click yes but by that time the application has failed to load the HRM.
This just go in a vicious circle. I looked at various BB support forums and I don't have bluetooth as an option under application security and I don't see any other options inside bluetooth control panel.
As a FYI other apps like Sports Tracker loads up the heart rate monitor with no hassle.... so there is work needed on the application side here.