intel integrated video and nvidia switching/optimus driver problem.

[thinkpadcollection]

This is a T410 with i7,

I could not install the intel video driver, but optimus driver installed fine and is working in the device manager, nvidia chipset is in use.

Is there way to manually switch and finish the intel video driver installation, the text installation says specific file to use for manual install is not there. Also even a search did not turn up on this needed inf file. All the drivers are from lenovo.

Thinkpadcollection

[hhhd1]

this
http://www.notebookcheck.net/Review-Len ... 368.0.html

says that the T410 doesn't have switchable graphics.