while executing scripts from QC, it overrides all settings of QTP

[Ankur]

1) To override QTP settings use automation object model(AOM). As an example go to Tools -> Settings there you can find a "Generate Script" button, use the script generated there in your VB Script, that will contain all the settings you did through the tool bar.

2) Need to see your application for this.

3) Yes, Why not?

4) Again use AOM I have described in first point above.