hi guys im really in trouble

.My G1 has a problem when i try to enter recovery mode.all things on screen just an orange triangle and the "!".It happened when i try to update this "signed-dream_devphone_userdebug-ota-14721.zip"at "developer.htc.com/adp.html#s3" .When installing that i didn't follow the instructions.Here is the installation guide:
"Flash Android 1.6 & the Latest version (stable)
You will now install the actual OS of the phone. First you will install the legal Google apps, and then you will install CyanogenMod on top of those apps.
1. Turn your phone off.
2. Hold the Home button while booting to get to Recovery mode.
3. If you wish to have an option to return to your factory settings, select nandroid backup now. If not, continue.
4. Press Alt-W (or select "wipe data/factory reset"). Press home to confirm.
5. Press Alt-A (or select "apply any zip from sd").
* Pick signed-dream_devphone_userdebug-ota-14721.zip.
6. Press home to confirm and let installation complete.
7. STOP - DO NOT REBOOT YOUR PHONE
8. Once again, press Alt-A (or select "apply any zip from sd").
* Pick update-cm-4.2.x-signed.zip.
9. Press home to confirm and let installation complete
10. When this is complete, reboot your phone by pressing Home & Back. [release buttons to start reboot]
11. Wait. Your phone will say installing radio and then reboot. This will take a couple of minutes. Be patient!
12. (When rebooting it may boot back to the recovery screen and say Formating CACHE. That's normal, just reboot again.)
If that's all you wanted to do, you're done! You should now have a fully functional phone. "
_
when in step 7 I REBOOTED MY G1 and now result is orange triangle and the "!" on screen when i enter recovery mode.
_i tried to enter fastboot by press and hold POWER and CAMERA button.
and it said
"SD checking ...
Loading...DREADIAG.zip
No Image
Loading...DREADIA2.nbh
No Image or wrong Image
Loading ...DREADIAG.nbh
No Image or wrong Image
Loading...DREAIMG.zip
No Image
Loading...DREAIMG.nbh
No Image or wrong Image" and then dissappeared very fast.
Does anyone know how to fix it ? or got the same problem plz help me.i was crazied with this.i want to update to android 2.1.HELP ME PLZ !!! Thank you guys !!

Here is my SPL info:
"DREAM PVT 32B ENG S-OFF
HBOOT-1.33.2005(DREA10000)
CPLD-4
RADIO-2.22.19.26I
Apr 20 2009,15:30:43"
