Root rooting 1.5 to 2.1 problem

[last rites]

following the directions in the sticky, it says to download the sdk package manager (what ever its called) then install the sdk's for 1.5 2.1 and the usb drivers. then says go to device manager and find the little exclamation, then when i select the usb drivers to install from the device manager it wont allow me. i have two in the directory they are i386 and amd64 neither of them work.

what am i doing wrong.

 

[last rites]

downloaded the sdk again, and seems to be working this time.

 

[last rites]

have another problem trying to adb shell chmod 755 /system/bin/flash_image it says unable to adb shell chmod 755 /system/bin/flash_image no such file or directory

read some other people have the same problem but i couldnt get it to work