Add your basedn to basedn (eg: echo o=denkn,c=at > basedn).

For initialization, first shutdown slapd and delete /var/lib/ldap/ (you will loose all of your data!), then use:

./00.root.ldif.sh | slapadd -b `cat basedn` -v

For adding 10 and 20 use:

slapadd -b `cat basedn` -v -l 10.acls.ldif
slapadd -b `cat basedn` -v -l 20.passwordhash.ldif

Now you can start slapd with your fresh config.

Via ldapadd -Y EXTERNAL you can add any other ldif.

For adding an user run ./90.user.ldif.sh username givenname surname emailaddr | ldapadd -Y external.