Create Vista Bootable DVD for install

[techallenged]

They do say how to "Create your own bootable Vista iso image"
http://www.heidoc.net/joomla/technol...download-links

You can then trigger the iso creation by opening "Windows PE Tools", which will give you a command prompt. There you enter the following line:

oscdimg –bC:\Vista\boot\etfsboot.com -h -lVISTA_EN_DVD -m -u2
C:\Vista\ C:\windows_vista_with_service_pack_1_dvd.iso

Yep, I load Windows PE Command prompt and (as per instructions on heidoc) enter "oscdimg –bC:\Vista\boot\etfsboot.com -h -lVISTA_EN_DVD -m -u2 C:\Vista\ C:\windows_vista_with_service_pack_1_dvd.iso" (without the quotes) in order to create the image.

However I get an error returned in PE:

ERROR: Could not delete existing file "C:\Vista\"
Error 5: Access is denied.

So, can you see if there is anything wrong in the command? Or am I doing something wrong?