Okay, Here's my Step-by-Step.
First Read up on Using the RomTool. and how to get it to Communicate
with your Treo. (Bootloader/Rainbow Screen, etc.)
1. Start the ROM tool program and let it talk with your treo.
2. Once that is done, Create a Folder on your PC's Desktop called "MYROM".
3. Go to the "Download Rom" tab and where it asks:
"Select the format to download the phones current ROM image as:" choose
"Directory"
(this downloads all the files, unzipped.)
4. choose "Browse"
5. Browse to the "MYROM" folder you created, and click "OK".
6. Click "Download" it should start dowloading your ROM into your "MYROM" folder.
7. When it is done, copy your "MYROM" folder to your "My Documents" folder, and rename: "MYROM ORIG". (this is your Backup of your unaltered ROM)
8. Go back to your "MYROM" folder you created on your Desktop, and delete the Fatfs file.
9. Copy the Fat32 file I've attached below, into your "MYROM" folder.
10. Go to the "Upload Rom" tab and where it asks "ROM Source" click "Select"
11. Choose "ROM Directory"
12. Click "Browse" browse to your "MYROM" folder and then click "Ok"
13. Then Click "Select"
The RomTool should now be uploading your modified ROM.
And you will see a progress bar. (see attached)
When the upload is complete, that progress bar will go away, and all you will see is something similar to the "upload complete" pic I attached below.
Even though as the "upload complete" pic I attached below shows a progress bar just short of complete, you can now close the RomTool and Soft Reset your treo.
Done!
This is how I modify my ROM. I can add or delete things just as if I was working with any folder on my Desktop.