bbrider2,
If you have Device Manager 4.6, I am not sure if it can install 5.0 OS' or later. I use the most updated version of it and it works fine for me.
(DISCLAIMER: Please do not try any of this if you don't understand how to do it. This will wipe your Blackberry smartphone. Once you wipe your Blackberry smartphone, all data will be gone from your phone.)
I myself don't have a data plan either. When I update mine, I:
1) Backup the device using Device Manager. Close Device Manager and safely disconnect the Blackberry smartphone from the computer
2) Uninstall any device software on your computer
3) Download and install the device software I want to update it to
4) Make sure the vendor.xml file is deleted
[Located in: C:\Program Files\Common Files\Research In Motion\AppLoader]
5) Then wipe the device using jl_cmdr
[If you don't know how to use it goto (Thanks CX):
http://forums.crackberry.com/f3/how-...l_cmder-53502/]
6) After the phone reboots giving you the 507 or pic that says it is empty, I then connect the Blackberry smartphone, and after it recognizes it, run loader.exe
[Located in: C:\Program Files\Common Files\Research In Motion\AppLoader]
This way, the computer/phone is forced to put an OS on the phone and the only thing it can give it is the one OS you want to put on it.
After it finishes installing, restore your backup, via Device Manager, and you should be fine. I hope this helps...