BuildOS and OEM are not the same. BuildOS is the program interface you use to create your ROM. An OEM is a folder containing everything one would need to build a certain program into your ROM. Download the PPC-BuildOS.zip from the first post of this thread and extract it to C:\BuildOS\BuildOS, replacing the file that is there.
I believe I read another thread where you asked how to fix the HTC Home plugin's weather so it would update. To do that go here:
http://forum.ppcgeeks.com/showpost.p...68&postcount=8
Download HTC Home 2.1.1005.722.zip and extract it to C:\BuildOS\User_OEM
Now when you run the BuildOS application, using the shortcut on your desktop, you can select the new HTC Home by Luv2Chill. Be sure to uncheck the old HTC Home.
Good luck.