Originally Posted by speedfreak228
im running miui and would like to use the newest cm7 kernel. how do i flash the boot.img to my phone without replacing the boot.img in mui rom and reflashing the rom?
You can heimdall it just like you can heimdall the zImage for kernels for Samsung-derived ROMs. Not sure if you can use SGS Kernel Flasher - haven't tried that.
When the phone is in download mode:
heimdall flash --kernel boot.img
I can't help you as far as Heimdall installations in Windows - I'm a Linux user.