There is a simple .msi file made by VS2008 deployment project. This .msi contains:
-NT Service to install
-WindowsForm programs as manager environment
-HTML files as documentation
-something else common (pictures, config files)
So there are lot of (probably to many) files in one package.

The .msi is already edited by this method:
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=3760614&SiteID=1
(Thank you PhilWilson)

But some problem still exists: Repair/Modify throws an error, if NT Service already installed and it works properly, but some program parts are damaged (also leaves them untouched because of installrollback). I guess, this whole feature is useless in this situation. Should be perform only (re)install, also reinstall instead of repair, but never repair.

I dont know, how repair works, but i hope, there is way to redirect it to install method fully. The only question, how to bam the windows installer ?

Thank you for any advance.