I am also having trouble getting the Coverflow app to load correctly on my DS. Here is my setup:
1) I received my DSTT Flash Cart last week and installed the latest TTMenu and a handful of DS games to my formated 2 gig MicroSD card. Everything is working great via the file browser.
2) I copied the Coverflow DS files to the root of my SD Card (IE: E:\DScovered.nds and E:\system). The Coverflow app appeared in the file browser but would not load (I would get the same pink error screen mentioned earlier).
3) Then, after some research, I followed a tutorial on how to install the YSMenu as my kernel since this is apparently necessary to get Coverflow to load correctly. I'm now able to load the program with no error, however no games are present in the coverflow view (I have already attached thumbnails to the DS games using the included Windows based app).
What am I doing wrong at this point? I'm also assuming I don't need to do any sort of DLDI patching for my DSTT card correct?