Thanks,
changing the the singelton_p column in apm_package_types to 't', for our package worked.
As well I found out that in apm_package_file_types the different file types are stored, all I had to do was setting the file_type colum in apm_package_files , for our SQL files, to the correct values for data_model_instalation/deinstalation . The package.info file is written with the correct values now.
We use OAcs 4.6, from cvs last updated in 10/2002.
Thanks for your help.
