Have a look at this blog post and the accompanying discussion. Although that is not a roadblock in and of itself.
Now (as you probably know) a TKLPatch is a script (or set of scripts) and collection of overlay files (often config files). So a patch can theoretically be applied to an AWS instance but for it to work you'll still need the base appliance and the RC is only core. So if you had a patch that was based on Core then it should work.
As for your Joomla and Magento appliance, unless you used a patch (or created one when you built your custom appliance) then it will be a little more tricky. And you still need the base appliance that you started with. Actually perhaps TKLBAM may work (although you still need the base appliance).
This v12.0rc is Debian based rather than Ubuntu
Have a look at this blog post and the accompanying discussion. Although that is not a roadblock in and of itself.
Now (as you probably know) a TKLPatch is a script (or set of scripts) and collection of overlay files (often config files). So a patch can theoretically be applied to an AWS instance but for it to work you'll still need the base appliance and the RC is only core. So if you had a patch that was based on Core then it should work.
As for your Joomla and Magento appliance, unless you used a patch (or created one when you built your custom appliance) then it will be a little more tricky. And you still need the base appliance that you started with. Actually perhaps TKLBAM may work (although you still need the base appliance).