Thanks a million for the install advice. I had been searching some of the aftermarket mirror sites for install instructions and it was scary!! One even said to pull down sharply for the 05 Tacoma, but be carefull, as you could break the windshield. NOW, how to you pull down sharply and still be carefull?
Actually, since mine is a Toyota accessory, I was considering going to the local dealer(they have a really good svc dept), and if they broke the windshield, they would have to replace it. But, now with your advice, I will give it a go myself. If the mirror turns out to be obstinate, then I'll run to the dealer. Thanks again, you probably saved me some $.

I'll post the results later - my truck is due in any day now. Now to hardwire the radar detector and get a sub behind the rear seat. . . .