Well, basically, what i'm saying -- this sounds pretty similar to the SHOW MY STATS feature.
Now the idea is, with that feature, you will show variables in more like an Inventory format, and it would be friendly to the player. I suppose, for the vars you'd temporarly like to show (i'm thinking, like PETROL in a driving scene, you'd have to do that with %%PETROL%% ...
Unless, of course, i'm totlally notunderstand the idear.