2.8? you mean 3.8? lol
well, your portal needs to have the image pack that the skin uses, since it wont read it from the forum folder n_n, so just upload the image pack to the path where you have your portal
When installing VBA Portal u need to modify the path's images in the header footer and style options to the full path like yourforum.com or
$vboptions[bburl]/images/etc/etc