Partitioning Schema And Filegroup Management

Hi everyone,
I have successfully managed to create filegroup Function and partitioning
scheme.
My question is how then Next month incoming increaze 2 functions.
Next will be 200812...how I made an add to the logic?

I found an example that explain me strategy...but with a fixed number of
Filegroup, making the switch IN / OUT. My case necessarily the filegroup
file are always on add


Thanks,
Alen Italy


PARTITION CREATE FUNCTION [] (DateCreazioneLogIIS datetime) AS
RANGE LEFT FOR VALUES (
DATEADD (ms, -3,'20070901 ')
DATEADD (ms, -3,'20071001 ')
DATEADD (ms, -3,'20071101 ')


)


CREATE PARTITION SCHEME [RaggruppamentiDateLog]
AS PARTITION [DateCreazioneLogIIS] TO (
[200709]
[200710]
[200711]
[PRIMARY]
)