How and should i reconfig my DB?

    Hi everybody,

DB's configuration was sent by software's vendor and I created DB looking to these configurations. All my - control files, redo files, sysaux's, system's,temp01's,undotbs01's,user01's  data files in the same catalog. I think i have to seperate them, right? I have 4 physical disks such as /u01,/u02,/u03,/u04, maybe i have to put them? if do i seperate redo files, how they will replicate with each other(multiplexing)?

I also got configuration of tablespaces:

SYSTEM = 1GB up to 4GB = /u01

SYSAUX  = 256MB up to 1GB = /u01
UNDOTBS1 = 1GB up to 4GB = /u02 (undo tablespace), i can put, if i dont have enough space in my cphusical disk /u02