Continue Setup after reboot asynchronously

Hi there

I have a problem with an InstallShield and reboot during setup.

The istallation I am creating is for 4 target system types. Every target system is a windows 7 machine with different vendor dependent software installed.

Now I begin the installation and at some point I need to make a reboot and then continue the setup. This is done correctly using the BATCH_INSTALL = TRUE;

The problem is, that after a reboot, to continue the setup, i need to wait for the vendor dependent platform to finish loading, this platform loads during Windows startup (a little tray-icon is also created after it finishes) to achieve this, every target system has a tool that I need to call, this tool just blocks and return after the Platform is loaded.

Now the Setup.exe begins immediately after the reboot (is registered in RunOnce) but it BLOCKS and Windows does not load and that means that the platform does not load, and that means that when I call the tool mentioned above using LaunchAppAndWait, i get a deadlock.

I just want to know if there is a way to start (continue) the setup.exe after a reboot WITHOUT blocking or preventing windows and all other stuff, to load.

PS: I tried almost all InstallShield project types InstallScript, Basic MSI, Installscript MSI, Advanced UI
PS 2: I tried using the parameter /delaystartup:300 for setup.exe but it still blocks and windows does not load, after the 300 sec, the setup.exe continue and the deadlock situation occurs again

Thanks and Regards