Kronos is wrong.
All kickstart 2 family chips come under the name of Kickstart 2.04.
What you are looking for is the version number. e.g. 37.300
You need 37.350 to use a HD over 40mb iirc
All A600s (including non HD versions) include the cradle iirc.
You wont get a 44pin IDE cable though.
You should get a Compact Flash card as harddrive rather than a 2.5.
No noise, heat. Saves room