Photoshop Compression Settings

Question regarding using Photoshop import and round-trip in Captivate. I love the Photoshop import feature in Captivate but would like to know if anyone knows if it is possible to set the compression settings on a layer by layer basis. What I find is the default compression is 32bit PNG which is nice but not always needed especially when you want to keep the size of the final published output as small as possible. I've found that using the "Extract Assets" feature in Photoshop is much more flexible when the final size of your project is important but this requires you to manually 'Update' images in Captivate once you have made changes to the Photoshop file. The image quality settings in Captivate are extremely limiting, basically going from High Quality (large size) to Slightly Less High Quality (a little smaller than large) to Crap Quality (really small size) and nothing in-between.

As an example - I've got a project that uses the Photoshop Import feature and that when published is 42mb (it's a very large project and I can not split it in to smaller files). Using the standard compression settings in Captivate the size comes down to 15mb, EXCELLENT! Until you view the quality which is shocking. By using another process of "Edit with..." from within Captivate and opening each file with Adobe Fireworks and recompressing each file using either JPEG or 8bit PNG with Alpha I've managed to reduce the size of the final output to 18mb with is very acceptable considering the complexity of this project.

My question is has anyone else found ways of setting the compression settings of images when using the Import Photoshop feature or have other workarounds that they apply to reduce the size of their final projects.

AndyK