Plugin to "stick" subforums in forums?

[footose]

I know this may be hard to understand... but say you have the following layout

main forum
'- general forum
'- sub forum1
...'- sub forum 1a
...'- sub forum 1b
'- sub forum2
...'- sub forum 2a
...'- sub forum 2b

Is there a current plugin aval that would allow you to "share" the general forum throughout the other subforums.. so for example:


main forum
'- sub forum1
...'- sub forum 1a
...'- sub forum 1b
...'- general forum
'- sub forum2
...'- sub forum 2a
...'- sub forum 2b
...'- general forum


but the "general forum" is actually the same in both subforums? or is this something that does not currently exist? If not, any suggestions on how i would go about doing this? i was going to override the array that lists the forums, but it got complex...