Bell Mobility pre installed software

[Gsxrboy]

I tried doing a search to find out how to remove some of the pre-installed programs that Bell Mobility has installed on my HTC Touch Diamond. The one program I want to remove is the GPSNav. I have gone into add/remove programs on the phone, but that program is not listed. Is there a step by step on how to remove some of the pre-installed programs? I have not unlocked the phone, nor do I plan on doing so. Its for business use and I need the phone as stable as possible.

Bell Mobility
HTC Touch Diamond
Not Unlocked