Installer performs rollback if i cancel on these steps:
1. Installing Program files
2. Installing WCM
3. Installing JAVA files
But when i'm trying to cancel on OpenOffice screen (cancel_oo.png), then installation is freezing till the screen cancel_db.png. It can take a long time on slow machines.
Further, on the cancel_db.png screen installation offers to cancel setup.
If i cancel setup on this step installation doesn't make a rollback, just exits.