RESTORE an Old Filegroup into an UpTodate Database

Greetings Group Members,

I am going to implement a strategy for archiving and restoring old
filegroups.
Part of my data has been stored in date partitioned files and
filegroups. So the archive is going to backup older than six months
filegroups into the tape and removes them from the production database.
The restore strategy is going to work as this: user would be able to
ask for restoring old filegroups. Every time there is a restore
request, first I am going to restore the current PRIMARY filegroup of
production database into another instance of SQL Server and then
restore the requested filegroup to the new SQL Server as well.
My question is if this restore strategy is possible to be done? I mean
is that possible to restore an old filegroup and a current PRIMARY
fileroup and keep the consistency and send queries against them?

Regards,