Let me guess, you're gonna get busted if it doesn't work properly? Why were you reinstalling Windows in the first place if it was a work computer?
At any rate, your best bet is probably to check on google or yahoo to see if someone has had a similar problem. Failing that, look for some utility that does the same thing, but was created by a third party. There may also be some standardized way that the laptop signals its position to the OS, so there may be a utility for another laptop model or models that will work. It's also possible that it's conflicting with another set of drivers - the NVIDIA control panel handles display orientation. One of those drivers may have a lock or override on the orientation command, and may have to be unintstalled or upgraded/downgraded in order to let the auto screen rotation utility work.