diff --git a/.gitignore b/.gitignore
index 4841fa4..a83c3ab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -114,3 +114,7 @@ playbook/shopfloor-setup/gea-shopfloor-keyence/vr6000/installers/Data1.cab
 # Part Marker (Telesis) utility password - secret, deployed via the enrollment
 # share from the working tree, never committed.
 playbook/shopfloor-setup/gea-shopfloor-partmarker/PartMarker/Mark/utilpassword.txt
+
+# HeatTreat per-machine DNC .reg exports (6601-6604) - contain DNC FtpPasswd
+# credentials. Deployed via the enrollment share from the working tree.
+playbook/shopfloor-setup/gea-shopfloor-heattreat/reg/*.reg
diff --git a/playbook/shopfloor-setup/gea-shopfloor-heattreat/02-Setup-HeatTreat.ps1 b/playbook/shopfloor-setup/gea-shopfloor-heattreat/02-Setup-HeatTreat.ps1
index f9a42a2..2d43059 100644
--- a/playbook/shopfloor-setup/gea-shopfloor-heattreat/02-Setup-HeatTreat.ps1
+++ b/playbook/shopfloor-setup/gea-shopfloor-heattreat/02-Setup-HeatTreat.ps1
@@ -9,10 +9,12 @@
 #     sets a flag) - so /norestart is safe.
 #   - Only LaunchCondition is NOT NEWERVERSIONDETECTED (blocks downgrade).
 #
-# NOTE: HeatTreat may also need a DNC .reg overlay (the WJPRT.reg has a
-# [...\DNC\HeatTreat] subkey section) and/or a file copy, mirroring the Part
-# Marker flow. That is unconfirmed - see the TODO below. Today this installs
-# DNC (via 01-eDNC.ps1) + the HeatTreat MSI only.
+# After the MSI, HeatTreat imports the per-machine DNC config .reg matching
+# the machine number the tech entered at imaging (6601-6604). The .reg files
+# ship in this type dir under reg\<machine-number>.reg. Like WJPRT.reg they
+# target HKLM\SOFTWARE\GE Aircraft Engines\DNC (the 64-bit view as written),
+# but DNC is a 32-bit app and reads WOW6432Node, so we rewrite the key paths
+# to WOW6432Node before importing (reg import does not honor /reg:32).
 #
 # Log: C:\Logs\HeatTreat\02-Setup-HeatTreat.log
 
@@ -45,9 +47,37 @@ if ($htMsi) {
     Write-Warning "HeatTreat MSI not found in $payloadDir (expected HeatTreat*.msi) - skipping install"
 }
 
-# TODO (unconfirmed): if HeatTreat needs a DNC .reg overlay + file copy like
-# the Part Marker, add it here - import the .reg redirected to WOW6432Node and
-# copy any overlay files into the install dir. Pending confirmation.
+# ============================================================================
+# Import the per-machine DNC config .reg (redirected to WOW6432Node)
+# ============================================================================
+$machineNum = ''
+$mnFile = 'C:\Enrollment\machine-number.txt'
+if (Test-Path -LiteralPath $mnFile) {
+    $machineNum = (Get-Content -LiteralPath $mnFile -First 1 -EA 0).Trim()
+}
+if ($machineNum) {
+    $regSrc = Join-Path $PSScriptRoot "reg\$machineNum.reg"
+    if (Test-Path -LiteralPath $regSrc) {
+        try {
+            $regText = Get-Content -LiteralPath $regSrc -Raw
+            $redirected = $regText -replace `
+                'HKEY_LOCAL_MACHINE\\SOFTWARE\\GE Aircraft Engines', `
+                'HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\GE Aircraft Engines'
+            $tmpReg = Join-Path $env:TEMP "$machineNum-wow6432.reg"
+            Set-Content -LiteralPath $tmpReg -Value $redirected -Encoding ASCII -Force
+            Write-Host "Importing $machineNum.reg (redirected to WOW6432Node)..."
+            $r = Start-Process -FilePath 'reg.exe' -ArgumentList "import `"$tmpReg`"" -Wait -PassThru
+            Write-Host "  reg import exit code: $($r.ExitCode)"
+            Remove-Item -LiteralPath $tmpReg -Force -ErrorAction SilentlyContinue
+        } catch {
+            Write-Warning "Import of $machineNum.reg failed: $_"
+        }
+    } else {
+        Write-Warning "No DNC .reg for machine number $machineNum at $regSrc - DNC machine config NOT applied"
+    }
+} else {
+    Write-Warning "machine-number.txt empty/missing - cannot pick a DNC .reg to import"
+}
 
 if (Get-Command Send-PxeStatus -ErrorAction SilentlyContinue) {
     Send-PxeStatus -Stage '02-Setup-HeatTreat: complete' -StageIndex 4 -StageTotal 8
diff --git a/playbook/startnet.cmd b/playbook/startnet.cmd
index 1f8d8df..677fa17 100644
--- a/playbook/startnet.cmd
+++ b/playbook/startnet.cmd
@@ -214,6 +214,7 @@ REM           CAL-{asset_tag}_serial-*_probe-*.iso.
 set MACHINENUM=9999
 if /i "%PCTYPE%"=="gea-shopfloor-collections"   goto prompt_machinenum
 if /i "%PCTYPE%"=="gea-shopfloor-nocollections" goto prompt_machinenum
+if /i "%PCTYPE%"=="gea-shopfloor-heattreat"     goto prompt_machinenum
 if /i "%PCTYPE%"=="gea-shopfloor-waxtrace"      goto prompt_waxtrace_asset
 if /i "%PCTYPE%"=="gea-shopfloor-cmm"          goto skip_machinenum
 goto skip_machinenum