Sony RP TV CRT replacement

Hi,

I have a Sony projection TV (model #KP57Ws500) and it needs picture tube replacement (Red CRT) according to a Sony certified technician. The total repair will cost me around $460 (part & labor). If I get the part, can I easily replace the CRT myself or does it require a technician to do that?

If you have any information on how to replace the CRT, could you kindly forward it to me for my reference? I would greatly appreciate your prompt response.

Thanks.