Ok, think my problem w/ install order is I was using "01" instead of "1".
The error happens during the install of Office 2003. Here's my code:
Installs.ini
[Microsoft Office 2003]
install=%systemdrive%\install\Applications\Office2003\setup.exe /qb-
selected=0
visible=1
installorder=23
active=1
popdesc=Microsoft Office 2003
boxdesc=Installs Office files ie: Word, Excel, Power Point
Office appears to install, but something it does at the end Installs.exe doesn't seem to like.
Also, calling Photoshop from a .cmd has the same issue. I have to kill Installs.exe process for the Photoshop install to continue.
I've tried the postreboot option, but it doesn't seem to work. The reg file is never entered from what I can tell. I manually ran the reg file and rebooted and all was well. Here is my code:
Installs.ini
[Photoshop 7]
install=%systemdrive%\install\Applications\Photoshop\setup.exe
selected=0
visible=1
installorder=24
active=1
postreboot=1
popdesc=Photoshop 7
boxdesc=Powerful image editor
ALSO, on a possibly related note

, The register option didn't work for me. Here's more code:
Installs.ini
[Nero Burning Rom 6.0]
install=%systemdrive%\install\Applications\Nero\Nero.exe /silent /noreboot
selected=0
visible=1
active=1
installorder=18
register=%systemdrive%\install\Applications\Nero\NeroReg.reg,before
popdesc=Nero Burnig Rom 6.0
boxdesc=CD/DVD burning software
NeroReg.reg
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Ahead\Nero - Burning Rom\Info]
"User"="Gordon W Smith"
"Company"="Geckotek Systems"
"Serial6"="removed"
Again, it seems to have not run the reg file.

Thanks for all your work!!!!