@bmesa though you can't really have SS1.0 call SS2.0 directly (or vice versa) , you should be able to call one another through suitelets or restlets. We were able to help a customer have their 4k line ss1.0 script call a ss2.0 restlet, which then using the task module, called a map reduce, and returned the JSON to the SS1.0 script. They'll eventually move the ss1.0 scripts to 2.0 but since they needed map reduce now, this was a viable option. I'm just not cool enough to have figured out a better workaround. Working on it though.