Using custom kernel and bootloader with MicroOS?

Is it possible to use a custom kernel and bootloader with MicroOS? I ask specifically because I am interested in supporting some specific ARM devices that may require custom kernel and bootloader support. WIth other Linux distributions, I effectively can package up my custom kernel and bootloaders and use them instead of the stock versions. At that point, I am mainly just using the userland software from the distribution, of course. If it is possible to use custom kernels and bootloaders, are there specific changes/support required for U-Boot or the kernel to support MicroOS and its many features beyond what a regular openSUSE distribution might need? Thanks! Paul