dude its windows its not a different complete os..
just put it on via ftp and run it.. christ.
im sorry im mad but u even asked if gesior would work on a 2003 server..
Thing is, I've got a server at home and I can't remember which version it is, although it is windows and opentibia servers don't work on it for some reason :O
Didn't mean to piss anyone off, just making sure.
Thanks by the way
I currently rent and host my OT with Windows Server 2008. All works fine.