In mkii, this is simply impossible.
Pablo RodrÃguez wrote:
> Hi there,
>
> I would like to use imposition to rearrange an existing PDF as a
> booklet, but I don' have ConTeXt installed on the machine I would like
> to do it.
>
> Using http://live.contextgarden.net/ might do the job, but I have
> problems to load the local file.
>
> Is there any way to load a local file (or even an URL) with ConTeXt? How
> should I rewrite the following command to load a local file or an URL in
> ConteXt live?
If you have the program "curl" installed, you can use an url as a
file name in context mkiv.