information on transferring from Berlin Schonefelf Airport to Brandburger Tor Appartm

Hi

Can anybody give me information on transferring from Berlin Schonefelf Airport to Brandburger Tor Appartments.
I saw on one forum that there is a Regenal Express Train to Hauptbahhof station approx 15 mins, and then a 10 min walk which would be fine but I dont think this is an up-to-date thread. When I look up the Regenal Express site its telling me that there is a few stops and changes .The S bahn is not direct nor are the bus journeys.

If someone has done this transfer or knows Berlin well I would be greatful for information.

Thanks

Its a short walk from the Schonefeld airport exit doors to the train station. From here trains leave regularly for central Berlin at a cost of around €3.20 as opposed to taxis at around €30. Just follow the crowd. The airport express trains just have a few stops. Haubtbanhoff is a huge station - you can't miss it.

I should point out that "Flughafen" means airport. Had me stumped before when I was looking for the return train to the airport and couldn't see airport written anywhere!

http://reiseauskunft.bahn.de/bin/query.exe/en?revia=yes&existOptimizePrice=1&country=GBR&dbkanal_007=L01_S01_D001_KIN0001_qf-bahn_LZ003&ignoreTypeCheck=yes&S=Berlin-Sch%F6nefeld+Flughafen&REQ0JourneyStopsSID=A%3D1%40O%3DBerlin-Sch%F6nefeld+Flughafen%40X%3D13513178%40Y%3D52391641%40U%3D80%40L%3D008010109%40B%3D1%40p%3D1340183863%40&REQ0JourneyStopsS0A=7&Z=Berlin+Hauptbahnhof&REQ0JourneyStopsZID=A%3D1%40O%3DBerlin+Hauptbahnhof%40X%3D13369548%40Y%3D52525589%40U%3D80%40L%3D008011160%40B%3D1%40p%3D1340183863%40&REQ0JourneyStopsZ0A=7&trip-type=single&date=Th%2C+28.06.12&time=11%3A00&timesel=depart&returnTimesel=depart&optimize=0&travelProfile=-1&adult-number=1&children-number=0&infant-number=0&tariffTravellerType.1=E&tariffTravellerReductionClass.1=0&tariffTravellerAge.1=&qf-trav-bday-1=&tariffClass=2&start=1&qf.bahn.button.suchen=

Thanks Perplexed that is a very useful link.