SQL SERVER 2000 32 BIT ON 64 BIT SERVER

CAN I INSTALL SQL SERVER 2000 32 BIT ENERPRISE +SP4 ON WINDOWS SERVER 2003 R2 + SP2 ENTERPRISE 64 BIT ??? CAN I DO THE SAME FOR SQL 2005 ENT. 32 BIT ??? IF I WANT TO UPGRADE TO SQL SERVER 2000 AND 2005 64 BIT ...

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