Do you have a IR you already like but eqing them changes to much of the balance? This is the Problem I run into sometimes and my idea was using another IR to mix in what you like. And these are the “Helper IRs”. Use a IR loader that allows you to mix different IRs and here you go.
Since the Helper IRs lack information in the regions outside their purpose they will not interfere with your existing IR as much and give your a more organic sounding boost of frequencies then a eq would. Also the curve you add to your signal has a character, while the eq is smooth the is sound like a cab and that mixes very well to your signal.