For those who are planning their trip, here are some links:

Information about Sodertuna Slott: www.sodertuna.se (Website in english, swedish and german, information about how to get there etc.)

Information about Ryanair: www.ryanair.com

Information about Airport Frankfurt-Hahn: www.tourist-info-hahn-airport.de/inhalte_dt/fs_index1.htm

Information about Airport Stockholm-Skavsta: www.skavsta-air.se/pages_eng/ (also car rental available)

Shuttle from/to Stockholm: www.flygbussarna.se/flygbussa/sv/index.htmlrna

Train Gnesta-Stockholm: www.sj.se/node/0,4452,3367_1,FF.html (approximately 1 hour)

Information about the city of Stockholm, hotel accomodation, sights, car rental: www.stockholmtown.com (available also in German, Swedish)