Adding new disk to volume group

[Kory Wheatley]

Currently I'm using Red Hat Enterprise 4 that has two disk on a Hardware 
Raid 1 (Smart Array 5i controller) that is setup in  a Volume Group
(VolGroup00) with the following logical volumes LogVol00, LogVol01, 
LogVol02, LogVol03, LogVol04, and LogVol05.    I recently added two more 
disks in our system/server  (these are internal disks on a HP Proliant 
DL380 g2) and set these disk as a Hardware Raid 1.  Now I haven't used 
Fdisk or nothing on these new disks. 

Here's my question:  How do I add the new disks to the already existing 
Volume Group so that I can have more space on the Volume Group.  Being a 
Raid1 I know your only adding one disk.  Could someone send me the exact 
commands to use?