bc-6.1.0-ebi1-signed.zip is not a ROM it is a port file. You need to flash the ROM then the port file. There is a link in the OP. Also, there is no need to rename it to update.zip anymore.
Ok, I missed that.
So I should first download and flash the file update-cm-6.1.0-DS-signed.zip
I can't download it from the link in OP (mirror.teamdouche.net/get/dream_sapphire/update-cm-6.1.0-DS-signed.zip). This page gives an error.
Is there another mirror for it?
EDIT: Found it somewhere else.
The install worked perfectly this time.
Thanks!
bc-6.1.0-ebi1-signed.zip is not a ROM it is a port file. You need to flash the ROM then the port file. There is a link in the OP. Also, there is no need to rename it to update.zip anymore.