ADCS Re issue Certificates to DCs

Hi

We have a Root CA and 2 SUB CA in Win 2k8 R2 version. My DCs(around 5 out of 8) got certificates from the a SUB CA and other 3 DCs got certificate from Different SUB CA. i want to configure all the DCs should get certificates from Same DC. How can i do this.

Thanks in Advance

Thanks SUBBU.T