[carelljones]

BlackBerry Desktop Manager 4.5 to 5.0.1:

Remove the battery from the back of the BlackBerry smartphone.
Connect the BlackBerry smartphone to the computer using a USB cable.
In the BlackBerry® Desktop Manager, double-click Application Loader.
Click Start under the Update Software heading.
The Device Password dialog appears. If the BlackBerry smartphone is password enabled, enter the password. If the BlackBerry smartphone does not have a password, leave this field empty.
Click OK.
If prompted with a list of Available Updates, choose the latest software version by selecting the corresponding check box and then click Next.
Click the Settings button under the Device backup and restore options.
Make sure that the Back up device data automatically during the installation process check box is not selected.
Make sure that the Delete all application data and Erase all currently installed applications check boxes are both selected.
Click OK on the Settings dialog.
Insert the battery into the back of the BlackBerry smartphone.
In the Application Loader wizard, click Next to proceed with the loading process.
When the process is complete, the Application Loader wizard displays the following message: The loading operation was successful.
Insert the memory card, if applicable.
Close the Application Loader wizard.