downgrade from 5.o to 4.5 on 9000

See my post regarding issues with software 5.o for my BB 9000 under the 9000 forum.

How do I backup to any version prior to 5.0?

Too many issues.

Install the exact OS on your PC that you want. In your case for the Bold 9000, it's
4.6 and not 4.5

Once you have it installed you need to delete all other installed OS's from your PC.
Once you do that connect to DM and it will detect the OS on your PC and ask if you
want to downgrade.

Reminder: Do you own backup before anything. :)

Thanks were do I get and how do I delete?

From this page download 4.6.0.304 (The third download link)
https://www.blackberry.com/Downloads...B1268AAA.node2

If you haven't downloaded an OS previously to your PC, then you won't have to
delete anything. If you have, just delete the other OS's from Add/Remove software.

thanks for your help

No problem.