[Silent .NET Maker synthesized 20100118 - W2K/XP/2K3 x86]

I've been bashing my head against this script for a couple of days now trying to get one particular problem sorted, and wondered if someone could offer some insight please?

I'm trying to create a fully automated, nlite-based XP SP3 install disk, including the base .NET framework packs (No Language packs, patches etc). It all seems to work perfectly through the script, however when I test the final disk, the .NET 3.5 pack simply isn't installed. These are my current _SNMsyntn.ini settings:

PROCESS_DNF1=YES
PROCESS_DNF2=YES
PROCESS_DNF35_DNF2=
PROCESS_DNF35_DNF3=
PROCESS_DNF35_DNF35=YES

PROCESS_DNF3_RGBRAST=YES
PROCESS_DNF3_WINIMAGING=YES
PROCESS_DNF3_MSXML6=YES
PROCESS_DNF3_XMLPSSC=YES

PROCESS_LNG_DNF1=
PROCESS_LNG_DNF2=
PROCESS_LNG_DNF35_DNF2=
PROCESS_LNG_DNF35_DNF3=
PROCESS_LNG_DNF35_DNF35=

OUTPUT=ADDON
MERGE_FRAMEWORKS=FULL
VERBOSITY=SILENT
COMPRESSION_RATIO=LOW

This results in three .7z files (DNF11, DNF20SP1, and DNF35SP1). I tell nlite about them at the "Updates" stage, do a little customization on the OS side of things, and tell it to build the ISO. The finished result is an autoinstalling OS with drivers pre-installed, but only .NET 1.1 and 2.0 in Add/Remove Programs. I've tried various permutations in the .ini file (Such as combining 1.1 and 3.5, fully combining all three into a single output file etc), and various other factors (Like changing their order in the nlite Updates page) with no success. I've even tried using the original .NET 3.5 instead of the SP1 version to no avail. Every single time, Add/Remove Programs (and the Registry agrees) only contains .NET 1.1 and 2.0. Can anyone offer me any advice on where I might be going wrong please?

Thanks in advance.

Ps. In case it may make a difference, the contents of my SNMsynth folder are as follows:

7za.exe
7zSD.sfx
dotnetfx.exe
dotnetfx35.exe
NetFx20SP1_x86.exe
README.TXT
SNMsynth.cmd
_SNMsynth.ini