I have a resolution test chart that instructs setting the distance between the front lens element (not the film plane) and the chart by formula, based on the focal length. I use manual focus mode after converting the distance between chart and film plane to metric (another reason I need that metric tape measure!).
Frankly, it's a pain to do and the amount of the chart that appear in the resulting photos varies from lens to lens.
The results viewed through a good loupe are reasonably informative, but far more important than hard numbers from formal tests are images from the field. As an easier approach, you can probably learn all you need to know about a lens' resolution by shooting a brick wall from, say, ten meters using slow film and a rock-steady tripod. This will reduce the impact of certain lens chracteristics such as bokeh, color saturation, etc., as well as eliminate the effect of focus errors on the part of the body (except perhaps with the 90 wide open).
There are some good articles on lens performance on the Zeiss, Germany website.
--Rick