No, I think you can use the bluetooth keyboard.
You can have it always startup from the DVD by setting the startup disk in system preferences. I have the USB keyboard so it wasn't a problem for me.
If there's no other system in the iMac, it will boot to the DVD. You don't need to worry.
I can confirm this.
Also on a side note I gotta vent a bit about my previous engagement with installing an SSD to an iMac. I recently sent my iMac to get patched up since it's memory got somehow corrupted and would function anymore. I even told the apple care guys the error code that I got with the diagnostics tool. It was clearly pointing to a memory fault.
Well yesterday I got it back. They had replaced the whole motherboard (I assumed that the problem lied with the memory slots in the MB). So happily I thought this would be a perfect time to put in my SSD, since it was pratically brand new at that moment and would not need service in a long time.
So I got to work and 4h later I booted up the machine only to find out they hadn't fixed the memory problem.
So I had to take out the SSD I put in and send it back to the repair guys. Man I was so frustrated.
Should've prolly made sure that they had fixed it before toying around with it.
Anyway I gotta thank all the guys in this thread for their awesome pictures and links to various sites. You guys helped me a lot. Atleast I got to see the innards of the iMac and I could see with the system profiler that the drive was working properly. The SSD fits perfectly when replacing the HDD.
The 3.5" adapter that came in the box with the intel x25-m g2 fit PERFECTLY. I can't stress this fact enough. It was amazing. The only thing that I did (like all the other guys in this thread) that wasn't perfect, was to short circuit the temp sensor thingie.
My initial plan was to replace the optical drive, but I found out that I needeed an adapter for that, since the optical drive uses a smaller SATA plug. I must've missed that at some point in this thread. But alas I'm prolly gonna order a HDD Caddy with the adapter included from eBay if they are able to deliver to Finland.