http://www.dafont.com/forum/attach/orig/4/5/45314.jpg how do you make it like that?

What software ? Photoshop? Illustrator ? Inkscpace ? Gimp ?

If you have Photoshop, there's a link to how to apply a gradient effect on text here.
http://www.createblog.com/photoshop-tutorials/1242-how-to-make-gradient-text-in-photoshop/

Play around with it and you'll probably be able to get it to look like a rainbow.
There also seems to be some other effect, too... You can try using a "chrome" effect?

yeah, it's not a font problem, it's a graphics software knowledge problem that you're facing.

Follow the tutorial given by cinny412 to get the gradient effect.

then :

- In the "layer style" window where you set up your gradient, there's "bevel and emboss" in the left column.
Play with this option to get the old school 3d effect

- In the "layer style" window where you set up your gradient, there's "drop shadow" in the left column.
Play with this option to get the shadow under your text

i use piant.net?

Google : paint.net multiple gradients

Create the gradient on a single layer using this plugin: Multi-color Gradient

http://tinyurl.com/68uvj38