Role-playing dimensions in a snowflake

Hi,

I'm a newbie on SSAS (2008R2).

Problem: I have a snowflake with 3 dates dimensions in another dimension. (DM_DIMENSION contains 3 foreign keys to the DM_MONTH).

I don't know how to create the roleplaying Time dimension. If the dates were in the fact that would be no problem, I've done it elsewere.

Anyway, Time is only Month and Year, so I would prefer to have it with the other DM_DIMENSION attributes. But how? I have 3 dates, so 3 relationships between DM_DIMENSION and DM_MONTH, which on to use for each month?

I wanted to create aliases in the DSV, but I've found no way to do it. Named query are an option, but painful. Views directly in the database another one.

Did I miss something? What would you advise?

Thanks!