Well here are a quick few;
In your .plr file, change the line 'miscellaneous' from 0 to 1. That'll let you hold right mouse button and zoom in and out in the showroom, not allowed by default.
Also in your .plr, change the line 'allow letterboxing' from 1 to 0. This will remove the black borders and replay controls when using the ingame replay feature, so you can capture unhindered screenshots.
I dunno if that's the kind of thing you;re looking for?