Wrong. I installed all the updates on my Milestone after downloading them from the Motorola website. Mostly because OTA didn't work for me. And on my Nexus On

Wrong. I installed all the updates on my Milestone after downloading them from the Motorola website. Mostly because OTA didn't work for me. And on my Nexus One I built Froyo myself from source and use it ever since. How do I do that with a Blackberry?