You are saying that you bricked your wii installing cios38r15? Is this right? Does not make sense, but hey. Try preloader a few more times before you can it, it would be nice to have. I will assume no bootmii as boot2, that would be great- you would see two flashes from the blue led at boot. So if the above is of no use your next option is savemiifrii and a modchip. First test savemiifrii and make sure it works because the chip is useless without it. If it does work you will need a modchip preconfigured to autoboot, they run just under $70.
It would be great if you could clarify exactly all the details that led to this situation.