Inliners International Forums General Discussion Engines "desktop dyno" or other software recommendation?

I'm looking to buy a new engine calculator program, I have an ancient Desktop Dyno, but install has become a PITA, requires a phone call every time, and it's got a number of annoyances.

I know I cannot get "real" numbers from a program like this; I use it mostly for what-if's and A vs B, and look for relative changes and shapes of curves, not X ftlb at Y RPM.

Of course I have to enter my own engine specs, nothing i care about is in the libraries (too old!).

Anyone use and trust any of this stuff?