1 - yes, we will only leave "custom" and "themes" directory and all other
directories/files will be deleted. This will done in 1.0.1 version of
Development Kit.
"admin/" is no longer required, because we use "admin/" folder from
"in-portal" module. "sample.htaccess" is not required because we have one in
"tools/.htaccess".
2 - yes, you can verify that by looking at "svn:externals" property contents
in your checkout directory, e.g. "in-portal.full"/"in-portal.community".
"svn propget svn:externals ."
Cheers!