cupcake 1.5 update

hi all.
 I have HTC(same as G1) running on 1.0 and would like to update to 1.5 but T-mobile will not send me update OTA since i dint buy my phone through Tmobile.  i have renamed the downloaded zip file to "update", dropped it into my sd card and proceeded with update.  upon reading my sd card, and opening update package, the following are the error messages on my screen E:No signature(413 files)..  and E:verification failed,  installation aborted..
Can someone help me with this please.  I am not a pro, as many of you are and need to be explained as 2 year old.
thanks

Hmm, First Off Are You Sure Its The Oficial Update?

And Do You Have The Rogers Dream?
(I Have Not Too Much Knowledge On It)

And Make Sure You Don't Have The Rooted Cupcake (Jailbroken Rom)

i am not sure it it is official.  i dont know where i can find an official  one. all links posted are dead ends.  wish there was a website out there where i could downloaded from.

http://android-roms.googlecode.com/files/signed-kila-ota-148830.de6a94ca.zip

Try that one.

http://jf.andblogs.net/2009/05/24/jfv151-images-are-out/#more-88

this is the most reliable one i know and i have never had problems with it.

Thats a Jesus Freke version and would require root. The OP wants the stock rom.

Thats a Jesus Freke version and would require root. The OP wants the stock rom.

o sorry.