NEED HELP!

[Guest Converse76]

Today I wanted to unlock my ZTE Skate. I made it like this video here

,but now I have the android software of Orange,but my provider is TELERING AUSTRIA. I didnt knew that and now I want to put a stock ROM on the phone but it doesnt work.

My boot recovery dont accepts the update.zip file on my SD (it writes E:Signature Verification Failed! ) ,and I was so dumb and didnt installed CWM recovery :( Now my PC dont accepts USB-Debugging,that means that I cant install CWM (I think so :( ) PLS HELP ME!

I dont know what to do. PLS PEOPLE HELP ME! :'(

P.S.: The driver for USB-Debugging dont wants to work :/