Requirements:
* A compatible S60 mobile
Steps :
1. Run the signsis.exe file
2. Select the unsigned file, your certificate file and key file.
3. Hit the Sign button.
4. You are done. Now, install the signed application.
5. Enjoy.
Note :
It only works with *sis and *sisx files.
Comments have been disabled for this entry, because cert requests goes to forum not comments. Link is above
redpepper007
If you do not have .cer & .key, get it for free at: 
