Filters on worksheet open

hi,
I want to apply filters on worksheet open from a URL.

from impl guide:
---
This is an example of the parameters portion of a Demand Planner URL that passes all
of the parameters
?user=mjackson&pass=thriller&queryId=11100&combination=424,3;492,4
---

is it possible to add multiple members in a level id?
ex: to add members 5,6,7 to above level 492
&combination=424,3;492,4,5,6,7

and will it work for general levels also, like promotion?
ex: promorion_level_id = 534 and promotion_id = 534,77
&combination=424,3;492,4;534,77



thanks,
krushna