Final Fantasy Hacktics

Hello, i'm new to the site and want to experience the FFH experience.  I've very excited to try out FFT+ but i'm having problems inserting my custom ramza sprite in the patched game.  When I try to open FFT+ with CDMage it says the file length does not match sector boundry, and when I try loading it via Shishi nothing happens.  Is there a way I can import my sprites or am I stuck?

Thanks