In the BES manager I show that I'm running version 4.0.3.7

* what is the latest version?
* can i download it? from where?
* can i simply put the cd in and run setup to do the upgrade?
* will i have to reboot?

Thank you!

whos your provider you will need to contact them the latest version is service pack 5.

Download it from BlackBerry.com Go to Support and Service packs.

It will most likely require a reboot

* what is the latest version? - as ||||||| said
* can i download it? from where? - as ||||||| said
* can i simply put the cd in and run setup to do the upgrade? Just a zip file you unpack and install over the top of the current BES via a setup.exe
* will i have to reboot? - sometimes you need to reboot, most often a restart of the services will do it.

i see that there is a service pack 5a for the 4.0 version of the software, but im trying to figure out if i can upgrade to version 4.1.... is that the newest version of the software?

You can update staright to 4.1 from your current version. I went from 4.0.4 to 4.1.0 with no problems (apart from the well known bugs that pop up in 4.1 that is).