Can i schdule & burst Business Insight dashboards. Also, can i do it if i create a dashboard using portals
No, bursting can only be accomplished with content created in Report Studio.
As tjohnson says - bursting can only be defined in Report Studio. In addition, Business Insight workspaces cannot be scheduled either. If you want to schedule and burst a "dashboard", you would need to create the whole thing in Report Studio as a report with multiple objects on the page.
Regards,
MF.
If you need an interactive dashboard (and dont use 2 much data) you can use Active reports of course and schedule & Burst them as normal reports...did this in my last job, pretty sweet 8)