ODS / Master Data planning with BPS (Using BSP)

Hy Experts,

i know from Business Planning forum that by now it is not possible to plan Master Data / ODS object in BPS. Someone hints that it could be possible by creating a BSP that actually allowed modification on Master Data InfoObject.

I'm new and i don't know very well how BSP works, does anyone here have any idea of a BSP implementation for thatt purpose?

Many thanks, every hints will be really appreciated and rewarded