setting beams for "odd" time signatures

[Adam Good]

Hello,

i would love some help with this!

I'm trying to set the beams in a piece with a 12/8 time signature so 
that I don't have to manually put in " [ ] " brackets around note 
entries.

the 8th notes in the 12 is grouped like:
3 4 3 2

so, in other words, rather than have to put in brackets like:
d8 e e e4 b'8 [a] g [fis g] e4

i just wanna type:
d8 e e e4 b'8 a g fis g e4

make sense?

thanks for any help...

adam