Following works for me:
Create Tmp Table with Section Access Information.
Export table as QVD(!) and reload the QVD with "where 1=1"
LOAD * INLINE [
ACCESS, USERID, PASSWORD, NTNAME
ADMIN, admin, 1234, *
USER, user, , *
USER, test, test, MS\SCOTT];
tmp_SectionAccess into TmpSectionAccess.qvd (qvd);
drop Table tmp_SectionAccess ;