Hi folks!
I think I have found a solution to my problem:
According to the InfoPath 2003 Help (http://office.microsoft.com/en-us/infopath/HA010834751033.aspx)
you can change your Manifest.xsf file in the deployed xsn file and then change the location from your server-name to the new server name. So if you want to deploy it to other farms you may write yourself a program which extracts the xsn-file and manipulates the xml-tags in the manifest to change the destination of the Webservices, data sources and furthermore the strings.
Maybe somebody knows a better way to do this (via xslt?)
Best regards,
Martin