Save and compare current list of startup programs

How about saving lists of all of the startup programs, BHOs, etc. present at scan time, and later being able to compare that to the current state to show me what has changed? That would be very helpful when one's system starts behaving differently. Or to see what that new application just installed so you can block all the quickstart garbage that's wasting your memory and processor time. Rather than block things via the CounterSpy prompts while an application is installing, I'd prefer to let the app install everything so I can first see how it behaves unhindered. Then I can go block the stuff I don't think I need, see how the app behaves afterward, and undo my blockings if they seem to have caused problems. Otherwise if you block things during installation, then find the app behaves strangely, you don't know whether the app is bad or if your installation blocking was at fault.