Well I work on a Mac, and essentially I use 'paint'. What I do is I find a pixel art sprite I like and I zoom in on the image, almost as close as I can, then I turn on the "View Grid". Then, each pixel becomes a template for what color I should put where. It only works for the square patterns, but for big stuff that's all I use anyway. Yeah those perler converters didn't really work for me. Also another hint on how to do big pieces is that I have 8 big boards, since their 29 pegs across I can make a 58X116 peg square. (two by four boards) then I cut up the image into 58X116 squares, re-create the image in perler, and then fuze the pieces. The Animorphs perler is actually 12 little pieces that I fused into three (for mobility incase I have to move). Anyway, that worked for me. Feel free to ask if you have anymore questions.