Custom settings rgu oem/cab?

[sethlo]

I would like to make a custom settings OEM and/or cab like the ones described here:

Originally Posted by gguruusa

In most cases, you can put the mods you'd make in a custom settings OEM - just make sure it has a late GUID (like FFFFFFF.....).

Originally Posted by luv2chill

. . . an RGU file in your own customize OEM package. Everyone should make one of these once they are comfortable enough with how the kitchen works. Make sure your customize OEM has a UUID that starts with several "f"s (at least three, up to the first eight digits if you want). This ensures that your entries will be the "last in" and won't be overwritten.

I am looking for a bit more detail in the "how to" department than provided in the quotes above (I have never made my own OEM or CAB, I just have used ones provided). I searched awhile and found a similarly "light on details" thread here:

http://www.ppcgeeks.com/cab-or-provx...ustom+oem.html

I also know about JBabey's guide on customizing a ROM but I don't think he explains this particular process.

Can someone help me out by providing more step by step details? Maybe even a sample?

Thanks.