AVR-Chat

I recently obtained a STK500 and two ATtiny13V's.  I've done basic I/O
with them already, but I want to try something a little more advanced.
 I've been researching interrupts, yet I fail to find any particularly
large amount of information on ATtiny13 interrupts.  Specifically, I
want to use 8-bit timer that it comes equipped with.  I've looked
through it's datasheet, yet the section on interrupts is confusing me.
 I am unable to understand how to initialize interrupts (or the
timer).  I also am having trouble understanding how to respond to a
timer overflow interrupt.  Simply put, I need to initialize the timer
interrupt so I can do a certain action every time it overflows.
 Can anybody please help me with sample code to utilize timer
interrupts on tiny13's or with a site that could help me with them?

Thanks for any help,

Kevin