Dear Friends.... I ended up doing it the "easy" way. I took all the media out. Cleaned the RAID, mkfs, waited until the beautiful blue box at the orbiter asking me to add the drive, LMCE structure, put the files back. It is interesting to mention that the first time, i used gparted to make the FS and did not worked, the drive was there but it was undetectable by LMCE. I think that it used something else than normal ext2 or 3. Tried again at the shell and voila! (#mkfs /dev/sdb1/ ) . I followed the "adding a new hard drive" @ the wiki of LMCE, worked perfectly.
Thanks again for all you help,