Wanna want your exchange 2007 32 bits for more than 120 Days ? No you won't

Wanna want your exchange 2007 32 bits for more than 120 Days ? No you won't...
I got my Exchange 2007 (32 bits) out of evaluation period..Ok but i do have a valid serial.

1. No way to find how to enter the serial from the exchange console..Any way, this console doesn't have the full set of functionnality...
2. I tried from powershell...It refuses it ! standard or enterprise, it refuses both...
3. I found from microsoft website that you CAN'T license the 32 bits version... damned!

I agree that Microsoft doesn't support the 32 bits version, but 120 days is short..