We try to use MultiPage property controll developed by Jeremy Norman and Nick Urry in EPiServer CMS, but we can't get it working. Is it not compatible with EPi 5.0?
The MultiPage property is not part of EPiServer CSM as such. The module is a Community Source project found at http://www.coderesort.com under EPiCode. The module is code "as is" but with full source. Questions regarding this module and others found on CodeResort should be posted on https://www.coderesort.com/p/epicode/discussion.
When you login into Coderesort, you will see what modules currently support EPiServer 5. Also check the timeline if you wish to see if anyone is planning to convert the code to compatible code.