You have to add such tasks with the use of records.ini
Add files to a freearc archive and add this archive to Settings.ini and records.ini
You can do it with either [TasksSettings] or [ComponentsSettings] in Settings.ini. You have to decide which fits better.
Example with [TasksSettings]
Code:
Task1.Name=Updates
Task1.ItemType=GROUP
Task1.Size=0
Task1.Level=0
Task1.Checked=1
Task1.Enabled=1
Task2.Name=Update 1
Task2.ItemType=CHECKBOX
Task2.Size=104.867 b
Task2.Level=1
Task2.Checked=1
Task2.Enabled=1
PS: If you don't want to use a GROUP for sorting items, then delete Task1 and change Task2 to Task1.
---
records.ini
[Record1]
Type=Freearc_Original
Source={src}\Main_Files.bin
Output={app}\
Disk=1
Size=10 GB
[Record2]
Type=Freearc_Original
Source={src}\Update_1.bin
Output={app}\
Disk=1
Size=2.12 MB
Task=2
If you use [ComponentsSettings] then use Components= key in records.ini