Ok

let me answer most question here:
What I do- I call Malaysia HTC service center but has been inform this phone is not in services as not yet official available in Malaysia.
- Malaysia HTC informed me this phone is not under universal warranty.
- I write an email to HTC via
http://www.htc.com/www/support/nexusone/contactus.aspx as I can't call Singapore 1800 from Malaysia.
- In Email, I wrote my phone can't on at all after I unplug the battery during hanging period, I feel so down as I just purchase it less than 4 days.
- I received email after around 3 hours past, requesting me sending over my faulty Nexus One to the only Singapore Service Center.
- A ticketting will be available inside the email where you need to respond, or else after 15 days the case will be auto close.
- I send over to Singapore Service Center second day afternoon alone with printed email reply from HTC web.
- The service Center taken my phone, and back cover (the battery, microSD card is returning).
- After a while, I being given a paper with Job No and being inform you can check your status same as you report before.
- Maybe due to I already bring over the printed email, the service center never asking me any question.
- Service Center informed me most probably will get fix and return the phone by next Monday.
- They provide delivered to your home / office (within Singapore area only)
- I am so suprise where I get call from my friend as the phone already ready.
- I am more suprise when I open up I notice it still wrapped, I immediate check the S/N and notice it was different with the box one.
My Opinion about CyanogenMod 5.0.4.1- Smoother visual effect, nearly no more lagging issue.
- Extra call button in all contact name.
-
Curve corner at Status Bar.- Power Control Widget bar color change to cyan blue, anyway to return back, I more prefered the android green.
- Startup will change from 4 color animation to blue before success logon to phone.
- Stable than stock ROM.
- Able to install lots of Apps that required root access.
- Auto APNs setup.
- Highly recommended flash but always remember be patient and read carefully all the step, don't ever be my next victim true brick the phone.
So Happy Now

I didn't flash the Radio this time since I not facing any signal issue and for SAFETY issue.
Once agains thanks for all concern and precautions and guide, at least I not happen to break it again.
Added on March 5, 2010, 9:24 pmThanks

is ok, as I more preffered custom ROM, hehe

can we choose not to have the curve corner at status bar? I prefer the stock 1.