Seems like we have a winner,he replyed by cellular text message and has almost all the answers,let's call him Mr. A. G'Yeah !
1-Montpelier is the capital of Vermont
2-Boston played "more than a feeling" a not-so-west-coast-song ,and Boston is also the capital of Massachussets
3-Michigan is in two parts
4- "Corpus Christi" is a city of Texas; "Don't mess with Texas !"
subsidiary question :
Juneau is the capital of Alaska,it's not Anchorage,and you can access Juneau only by boat or plane.
The fifth question was pretty tough...
Alaska and Louisiana are not divided in counties