The hardware setup is the same for both cores, so not realy any need for another tutorial.
If you download the tiny core Google Code Archive - Long-term storage for Google Code Project Hosting. , there is a readme file explaing how to install it.
BTW I once made a short tutorial for the attiny2313 found here Programming Attiny2313 with Arduino Uno , it is basically the same as for the attiny85 (apart from the pin numbers etc)