Have you checked out: http://docs.blesta.com/display/user/SolusVM#SolusVM-CreatingPackages mate?
There's a bug in SolusVM which you might be hitting:
Node Group Bug in SolusVM
There is a bug in SolusVM with the Default node group. If you select a node group for provisioning when creating a package, don't use the "Default" node group. First, create a new node group and assign your nodes to it in SolusVM. Then, select the new node group within the package.