Install 10.6

Hello,

I have installed 10.6 on Leopard. It worked well, until I have started to experience difficulties in the operation of the Finder activities. I have trashed some software, which I have discovered as faulty in the log of the Console, but it repeated itself all the time. I am tired of it.
I would like to install the 10.6 on a formatted HD, and bring back my material from my external drive Time Machine.

My problem: how I can bring back essential materials, without the spoiled ones.

TIA

 

Install 10.6

To macuserx86:
Thanks for your reply. I am attaching a screen picture which sows the problem of simple activities on the desktop such as dragging a file from place to another on the Finder, and dragging a file into the Trash. It is on a screen picture of the console in the time of this phenomena.
I hole my problem is clearer.

To stridemat:

Thanks for this explanations.
I am trying to think about a procedure which will avoid formatting of my disk, by trying to trash many software on my HD, unnecessary ones, which were installed, may be even since 10.2. Is there an application which, when trashing a software would trash all the attached part of it in the preference folders and in the application support?

I would like to mention that I have trashed Fruux, and it improved the situation for a while, but the problem have returned.

Once again, thanks you both