SFX problem

I'm trying to setup an SFX for my Norton Ghost installation files. The plan
is the SFX extracts to a temporary directory, then runs the SETUP.EXE. This
seems to work fine with WinRAR or WinZip, except with the Ghost
installation, the SFX stub thinks the SETUP has finished and deletes the
installation files from the temporary directory, therefore causing the Ghost
installation to fail.

I'm using WinRAR 3.20 and WinZip 8.1 on Windows XP Professional.

I've tried supplying the /SMS switch to SETUP but it doesn't seem to work.
In WinZip I've also gave it the MSIEXEC as a program to wait for, this
doesn't work either.

Any ideas?

~ Adrian ~