The DT plugin downloads a list from java.com, dtoolkit.xml, that contains the bundleID of each version for each "type".
right now, it points only to 32 bit installers.
The type attribute only allows "kernel" or "online".
By adding type for kernel-64, and online-64 we can, without changing the api, allow the 64bit version of the plugin to default to only installing the 64 bit version of the installers.
We could also allow, by doing this, the web page to specify exactly what it wants. for example it could install both the 32 and 64 bit versions.