I guess I should have been a little more specific here. The reason to try to export to Outlook from Korganizer was that I have not been able to synchronize my new Palm TX with KPIM. So, while I was working on the synchronization on Linux, I tried to take the minimal effort path and transfer my calendar and addresses to Outlook and use the alredy working conduits. However, there seems to be a problem with Outlook, which is unable to recongize the iCal format, as far as I've seen (although its menu shows the option). I didn't have any problem to export from Korganizer to Lightning, for example.
For the time being, I'm using an old Palm to synchronize my calendar and addresses, and from there to my new TX, according to cconrad's advice. Of course, synchronization is still a work in progress for me, and I'll post as soon as I something of interest for Palm users (on the corresponding forum).