wow,that guide makes no mention of different firmware,and it looks like lots of folks had prollems,and there has been no support or help offered.
if you check out the thread for creamy kang here: [ROM][Dev] .: :: Creamy Kang™ 2.0.0 | ICS | AOKP :: :. [UPDATED 03.21.2012] - xda-developers
it lists the firmware you need to flash: http://goo.gl/RcbMy
you said you got a different phone,but if you still need to know how flash this rom,the way i would do this,without adb and a cmd window is this:
download the rom,gapps,firmware. place them all on your sd card. rename the firmware to PG58IMG.
boot to recovery from your current rom via "quickboot" app or rom manager.
-make backup,if needed.
-select power off option if your recovery has one(if not,pull battery)
-power on/vol down to get into hboot. it should find PG58IMG and ask you to update. tell it yes.
-when its done,power to reboot.