Macintosh - Remap letter keys?

I have a Mac, at home and at work, and I am constantly hitting “y” instead of “t” and vice versa. I don’t know why it’s just those, I can type completely error-free except for those two letters(and “t” is very common, so I’m backing up a LOT).

I know I can change the function of the CTRL, FN, ALT, etc. keys, but there doesn’t seem to be any way to switch letter/number keys.

Anyone know if there’s a way to do this?

How about this ?
http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=Ukelele

Ah, missed the edit window.
Maybe the above is not what you need.
Something more like this probably.
http://pqrs.org/macosx/keyremap4macbook/index.html

ETA: Not quite but close

Yeah I looked that over and it will change almost everything *except * letter keys, or change the entire letter key layout, but not individual letters.

Very close though.

Is there a specific reason why Apple wouldn’t want me messing with the keyboard layout?

Creating custom keyboard layouts for the Mac (Mac OSX Hints) refers to this Web-based tool (Unicode Keyboards for Mac)

That might just be it. A little more complicated than I was looking for, but I’ll play around with it.

Thanks!

“Gee, I’ve thought about switching to the Mac, but I’m afraid using it would feel all different and weird. Let me try yours…”

Do you ***always ***transpose the t and y? If not, you’re likely to encounter the same problem.