Help me please, Nokia Kernel shortcut shows some error, and I really need to reinstall it!

"Some error"? What error exactly?

You can start with,
Please paste the output here if you want more help.

Here is the output
_________
/home/user # apt-get install --reinstall -y kernel kernel-flasher
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
file libmagic1
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 2 reinstalled, 0 to remove and 6 not upgraded.
Need to get 2046kB of archives.
After this operation, 0B of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
kernel-flasher kernel
E: There are problems and -y was used without --force-yes
/home/user #

I see. In that case, either skip -y or add --force-yes.

BTW, your title is misleading. You are not asking to reinstall Power kernel, you are asking to reinstall Nokia kernel.

My title is not misleading, I was just trying to install stock and then install power again, gonna report in a few minutes

Thank you... again!!
So I flashed the image and then rebooted, all went good. But how to get power back? (don't see it in AppMan)

http://talk.maemo.org/showthread.php?t=94287

Ignore everytrhing else, just read the Installation paragraph. It is the second paragraph in the first post.

All good. THANK YOU!