What is Orchestrator API to 1) selectively install a package and 2) set Configuration values in the package ?

Hi,

I'm building a vCO plugin for a solution and I'm not able to find Orchestrator Plugin APIs to do the following or want o find out if it's even possible...

1) The plugin has 2 .packages bundled in it. The generated VSO.xml has code to install the first package with the 'ALWAYS'  mode. I want to control the installation of the second package based on the user input in the plugin configuration. What API do I use to dynamically install the second package ?

2) Some of the user input from the plugin configuration screen needs to be stored in the package configuration, which will be then accessed as attributes in the workflows ? Is there an API to do this ?

Thanks