I am in a dilemma as to which tool should I be using to make the sis files comply with the E63 I keep getting error messages.

I.E.
Expiration
or
Error
etc..

I need to understand how to sign sis and unsign it.

I am all too confused in the order or method in place.
If anyone could assist me further I would be grateful.
I have read the tutorial but I just would like one way to do the signing. Please suggest the CORRECT TOOL for my phone Nokia E63.

Thanks people