you can actually buy the fabric dye right on that site... if you look at dye pages, I'm pretty sure there are directions on how to dye fabric in your washing machine or sink. Or, you could go to Target or the grocery store and buy RIT dye, which you just dump into the washer with the clothes and call it done.
I'll definately check out the dyes - sounds like fun too!
I have a Brother PE 180D machine. DH bought it for me for Christmas, and then for Mothers Day he bought me all the supplies for it (I didn't much feel like crafting while pregnant), so I'm just now getting the urge to embroider everything - LOL.