This version of MCS supports Joomla 1.5 Legacy mode.
Although I'm busy, I found many users asking for adding some features and fixing bugs in the configuration panel of MCS, so I decided to go and do some progress.

It is not fully tested, but I tested it on Joomla 1.5 and Joomla 1.0.13, but not tested with CB 1.1

I have changed the configuration form, so now you can use WYSIWYG editor to format your invitation and activiation emails, and the emails will be sent in html mode.
Go to this page to download:
Download MCS 1.0.3

The last thing I want to say is:
If you want to support the development of MCS by donation, you can contact me via the contact us page.