how do you mean ununpdated 3DS?
my current version of 3ds is 4.2.0-9E if that is any help
Yes, that's what I meant, sorry for my bad english
Your 3DS is on the last firmware version,
you have to wait until Supercard Team release a firmware update for DSTwo.
When it get's released, just put the files of the zip on the root of your MicroSD and start DSTwo like you always do