How to Sign Unsigned Applications for Symbian S60

How to Sign UnsIgned Nokia S60 Applications
Sometime the applications or games which we need to install in our cell phone seems to be unsigned( give certificate error) or ( Install Error)
So, Dont be Disappointed, here is the easiest solution ever.
First step:
Download Free Signer

Second Step:
Install it in your S60 Nokia Mobile

Third Step:
Go to the Above mentioned site
www.cer.opda.cn
Register for free their.
and then apply for the certificate( fill the required fields as you need)
Now Go their again for about after 24 hours.
and then there should be the .cer and .key file (Save both of them into your mobile )
then go to your mobile and open free signer,go to options>settings>Sign cert: now browse the .cer file where u had placed it.
2.options>settings>Sign key: now browse the .key file where u had placed it.
now click back,
there should be add task,click on it and now browse the application file which u want to sign,select it and click option>Add
Now select sign sis.
Now main screen will appear and now click option>Go!
That's All
Now the signed file should be saved at the same location where the unsigned file was located.
Enjoy !!