So, with the help of another raspberry pi enthusiast, I was able to take my stock retropie image, flash it to an sd card, and modify the image so that the rainbow at the start of bootup goes away, the bootup text is silent, and displays the retropie splash screen, and it boots right into emulation station after the splash screen. I also made it give a silent shutdown, to make it look beautiful.
If anyone is interested in me making the image available for others to download and try out, let me know. I think it looks nice, its only got a black screen during bootup for a few seconds, same with shutdown.