Thanks for the hint with Inno, actually, I have found it several days ago myself and I'm just in the process of making up the setup.
The "Inno Setup Tool" even let me to a drag and drop with all the files. The only thing not ready yet is the detection of the install path and to ask the user if he really wants to install to a directory that has no SE4.exe present. Unfortunately SE4 does not have one single registry line where it puts its install directory, just an uninstall string that I must process to read correctly and even then I cannot use the path directly to install to as it is written in the old dos compatible way...
