I think if you have prior knoweledge then you will be fine with this extension but if not you will be stuck like me with no support. I linked the paths to the ici calender but still got error messages in the end I just uninstalled it as I dont have the time to figure out what to do.
Maybe this is a what I need but I will never know.
I am surprised about your no support comment. I have personally replied to every email that has been sent to me for support and to any postings on the forums. Did you do either of these things?
Documentation is included in the zip file with the extension under the docs section and FAQ's on the site.
If you send me an email with your exact problems I am only to happy to help.