batman..
I don't worry with popping the berry and separating the seeds either...
If you just plant the berry (with 2 seeds in it) and follow up on it... by the time those seeds go thru the stratification process (from that fall, thru the winter, spring, summer, fall again, winter again, then spring and finally sprout)...
The two seeds will often be separated by natural soil movement (freezing, thawing, heaving, etc)... and when they finally do sprout they will be as much as 2 inches apart.
I have followed up on them like that and seen that happen.
TNhunter