yasamoka wroteBoth need their own kernels. You cannot use the kernels that were made purely for the stock ROMs on them.
Kernels are usually installed along with the ROM itself. Then, you are free to flash another kernel. Why are kernels risky? They are not. They are just a part of a larger procedure that itself is risky if you don't follow instructions or have no idea what you're doing. But even this risky procedure rarely leads to hard bricks, if you don't screw around too much.
My friend (he knows himself :P) flashed a KERNEL for i9100 custom ROM on an i9100G instead of flashing a ROM for i9100G. A 6MB file, getting flashed via ODIN, not the 300MB+ ROM. The phone only gave a caution sign that it needed to be connected to a PC, and we connected it, flashed a stock ROM back with ODIN, and that's that. Easy as pie.
You have to go TOO far before your phone is almost unusable / unflashable. And even then, there are solutions for extreme cases (I'm not sure if all of these cases) such as USB Jig and Riffbox.
Yeah yeah i get it, looks like there is bo escape from another kernel, well i did extreme stuf back in the old days with my n900 i uaed to get another kernel on it so i can overclock it, i also had android and windows 98 on it.... the good old days, im completly new to android, all what u had to root maemo 5 is to install an app thats simple......
It looks like im gonna be busy studying this week so nchalla will get my ass to work this week end.
Thanks mate....