[R-SIG-Finance] Questions about IBrokers package

[Robert Schien]

Hello,

is it possible with the current IBrokers package to
create spread/combo orders (eg. futures calendar spreads) 
in analogy to the Java API as described in APIprintable.pdf?

And I want to display the spread in a streaming chart.
Two-Minutes charts would be sufficient. I don't need
really real-time.

Which charting package would be good for this purpose
(easy integration of the IBrokers package for the data)?

Where should I start?

Thanks in advance.
Robert