restore file/filegroup for partitioned tables

Hi.
Our DB has Primary file group (data and log files are there) where all
lookup are.

has 2 big tables each on own partition (by date) with their indexes.

so

Primary has file xxx_data.mdf and xxx_log.ldf

the 1 big table1 and its indexes are on paritions by year.
data of 1970 on part_1970 filegroup part_1970 filename part_1970.mdf
data of 1971 on part_1971 .......................same
thing.......................mdf
..up to 2008
..
..

and so the other table2 (but by 10 years)
data of the 70s on part_70s.mdf
data of the 80s on part_80s.mdf
..up to 2008
..
..
there are no FKs between tables ..


Now.
I need a way to get:
primary file group and its data
the last 2 partition of table1 (2007 and 2008)
the last 1 partition of table2 (2000s)

I did a backup for the file/filegroup
WITH NOFORMAT, INIT, NAME = N'Forecast-Full Filegroup Backup', SKIP,
NOUNLOAD, STATS = 10


when restoring (with move, REPLACE , NORECOVERY / RECOVERY )
I am getting that the DB is taken offline because something was not
completed.
and the DB shows as (restoring)..
what am I missing here.

THANKS