In Response To 'Re: SelectionEvaluate'
The converting in a package worked after defining all cells as initialization cells and I can load the package with 'Get' and it executes it before it goes to the next cell in the calling notebook.
(For reference for other users with the same problem)
Of course to create the package I had to set the AutoGeneratedPackage option in the Option Inspector under Format for the specific package to Automatic or Manual.
PS.: Wolfroam should realy thing about a way to enforce the execution order such that you could call other notebooks as a function without creating packages. Otherwise you have to make always sure that the package is updated.