Just bought a security ECU from eBay but its a slightly different part number.
Mine is LNA2600CA
The one i bought was LNA2600CC

It doesn't exactly work, but he said CC is the newer one and its possible to reprogram it. Anyone here know how its done?
Probably need some special equipment I presume, or can it be done some other way?

Thanks in advance for any replies.

The security ECU can only be programmed using dealer level diagnostics.