You can download it after having required it.
If you just want to see, be aware that downgrading will not be possible before 24H after install.
You really should consider reading this forum before going 2.0 beta, as it is somehow tricky to use and needs at least 1 workaround to restore some of the end-users functions (bridge) while others simply won't work/show.
Anyway, don't miss these steps :
1. BACKUP YOUR ENTIRE PB WITH BB DESKTOP SOFTWARE
2. Make a security wipe of current installation after backup and prior to upgrade
3. READ and understand the whole FAQ and warnings on the next step page
3. Register at https://bdsc.webapps.blackberry.com/...et20/register/
4. use your BB Desktop to upgrade/downgrade
No need for good luck if he knows what he will have and take appropriate precautions ...
My "OS2 beta turn" was very exciting, even if I decided to downgrade a few days after for convenience and stability. Wish I had another PB or tablet to keep 2.0 running and eventually get the beta's upgrades ...
I've not seen any unsolved problem so far, to the point of bricking the PB and being unable to downgrade (+ 24H warning) and restore exact previous configuration ... If there's any special matter you want to warn him about, please do it clearly. Better be warned than exposed !