there are only minor differences in software between .1 and .2. if you want the whole package,id go ahead and run the ruu for 4.03.605.2. i dont know what the differences are,but newer is almost always better(except when it patches exploits
if all you want is the firmware,then it doesnt matter a whole lot,as .1 and.2 are using the same fimrware,so you can use the .1 firmware zip. be aware its also installing a boot image,so youll need to install a new boot image to match whatever custom rom youre running,if youre not running a rom thats based on that software.
with the command adb push PH98IMG.zip /sdcard
you did in fact push PH98IMG to the internal storage
where hboot will not find it. you may also have trouble with the name,depending on how you named it. since windows adds and hides file extensions,if you typed in "PH98IMG.zip" you may have inadvertantly named the file "PH98IMG.zip.zip" wich is equally invisible to hboot.
theres nothing special you need to do for s-on to run the signed ruu,other than relock the bootloader. just put it on the sd card(via mounting as disk drive or adb as youve done,but push to sdcard2) and boot to hboot.
its a long update,so make sure the phone is charged up