Hi, do you have version 2013 of RWPhotos? If I remember correctly, it should be possible to click on other windows to bring them to foreground in the latest version. I have hard time testing it, because on my computer, the splash is visible for like half a second.
Perhaps it will be possible to make RWPhotos start faster for you so that you won't notice the splash. Putting it on a fast hard-disk should help and if you are not using the advanced editor with layers, deleting its configuration should speed up the loading time as well.