Mailarchives (A89: AMS 2.05 and ASM)

I have read through the archive of old messages to the list about AMS 2.05 problems with shells and asm programs. I have also read other pages on problems with the new AMS and they said that you couldnt downgrade AMS 2.05 to a lower version if it was released with version 2.05. I just wanted to make sure that this information was wrong and that it does work before I buy a TI89. More than likely the only ones available will be version 2.05 and the reason I'm getting one is so I can program in asm and enjoy the extras that everyone has made for the calculator. Also I read in the list archive that there is supposedly a version of the doors kernel that can run right on 2.05 but does that allow the programs to install and run on it also? Thanks for any help in advance.