I have had a multiboot usb like this for a long time using unetbootin, but never had the splash screen so I decided to redo it using grub. I used Gimp portable for windows and it didn't work. thank you for the answer to this sirBAMF, you rock!
The colors went to white text and black text/white select after using this for me also.
I used to use an online version of imagemagick back in '97 when i was on webtv, brings back memories.
thanx again.