Way to quote the entire first post there, bud.

At least now we know you know where to find the Amon-RA installation instructions.
My suggestion may seem a bit rash, but it should work.
I assume you can successfully use fastboot, as it appears you can. If not, you should do some more research before continuing.
Back up what you can. If you can boot the rom, as it seems you indicate, do so and export any of your important data to the SD card.
Then put
this file on your computer somewhere. Let's call that location "c:\location\" and the file "orange.nbh". Of course, replace these with what you actually save the file as and where...
You no doubt have Amon-RA 1.7 downloaded somewhere. Move or copy it to the same folder. Preferably, have the .IMG file handy as opposed to a .ZIP or other.
Then get the radio, HBOOT, and ROM you want to use.
This file should have something that will work for radio and HBOOT. Unzip it to the same location. Note that there is at least one newer version of the radio for G1/ADP, but this radio should work with recent ROMs and kernels. Then you just need the ROM, which it appears you have as well.
Then reboot the phone into fastboot mode, and make sure the phone says it is in FASTBOOT mode. In this mode, on the PC, in command prompt, type "fastboot flash nbh c:\location\orange.nbh" (remember to replace the file path/name with what's really there for you). This will give you a known-good SPL, radio, etc. and flashing things should work (should anyway on the SPL version you have).
Then reboot the phone BACK INTO FASTBOOT MODE ("fastboot reboot-bootloader") and make sure the flash worked (should show numbers consistent with Orange instead of the HBOOT you're used to). If so, run "fastboot erase system -w" then "fastboot flash radio [whatever-the-radio-file-is-.img]". WAIT for it to finish. Then "fastboot flash hboot [whatever-the-hboot-file-is-.img]". WAIT again. Then flash recovery, "fastboot erase recovery" / wait / "fastboot flash recovery [whatever-the-recvy-file-is-.img]" and wait again. If all is successful, reboot the phone into recovery. Should now be running Amon-RA.
I have done this successfully on my phone several times. Sometimes by choice.
If you need more step by step than this, go to Google and try searching for how to use fastboot on an HTC Dream. There are plenty of tutorials out there that will allow you to help yourself (so you don't have to wait for us to walk you through it).
Sincerely hope it helps...
CJ
EDIT:
Actually, if you can get into CWM Recovery, you should be able to flash the Amon-RA *ZIP* file from there and it "just work" without all that BS above. I forget where my Amon-RA ZIP file was found, I see here only .IMG files... let me hunt for a sec...
EDIT2:
With your SPL, being an "ENG"ineering SPL, you should need only do one thing: Boot the phone into FASTBOOT mode and from command prompt do "fastboot erase recovery" then "fastboot flash recovery [path-to-amon-ra.img]" then reboot to recovery. You shouldn't need the whole "orange" nbh kit.
EDIT3:
Appears a dot-zip of Amon-RA does not exist, so it appears one can only get Ra via Fastboot.