Cascade streaming replication + wal_files - Pgsql 9.2

I got two slaves using Postgresql 9.2.

slave01 - Streaming replication from master

slave02 - nothing.. new server

is it possible to get slave02 replicating from slave01 (Cascade streaming replication) this can be done with streaming ? and also slave01 sending the wal_files to that new slave02?

So it would be on slave01

archive_mode = ok 

archive_command = ....

wal_level = hot_standby

max_wal_senders = 2

wal_keep_segments = 128

Is that right?

Cheers guys!

Patrick