Still learning how to read pinout diagrams...
Are MOSI and MISO on the ATtiny equivalent to RX and TX on pins 0 and 1 on the Arduino?
(Or are you saying it's something different, PaulS?)
Would I be right in thinking that to add an external clock to the ATtiny45 I put a crystal across physical pins 2 and 3, with caps between 2 and 4 and 3 and 4? [datasheet]
I have some 16MHz crystals and 22pF caps from making breadboard arduinos, can I use them? I notice the list in the IDE under tools > board only has an option for a 20MHz external clock...
This is the chip I'm using: http://uk.rs-online.com/web/p/microcontroller/6962614/
...and would I need to do anything to undo the 8MHz bootloader command step I did before?