well, easy enough?

wait! now your phone works again. but you made it work behind its back. nobody likes things happening behind ones back neither do phones.

go to the programmanager and install the kernel you just flashed.
might sound dangerous after your expierience but you want the system to be completely in a sane state. otherwise in a couple of days/weeks the thing updates and the other kernel that gave you the trouble gets installed again half ways as you had it. you don't want that.