automatic bar marks possible for ie, 28/4 ?

[Adam Good]

Hi Everyone,

For a piece that has a time signature of 28/4 is it possible to set 
lilypond to have barlines dropped in automatically?

for example the piece is in 24/8 but the grouping would be 6+4+4 + 6+4+4

so, after 6 beats, a barline, then after 4 beats a barline, after 
another 4 a barline, etc.........

saves me from having to manually drop in the barlines.

thanks!

Adam Good