A friend of mine was just showing me these

á = hold (Alt) button then key in 160

é = hold ALT then key in 130

í =hold Alt then key in 161

ó = hold ALt then key in 162

ú = hold Alt then key in 163

In order for these to work, number lock has to be on. It only works with the number keys on the right hand side of the keyboard, not the top numbers. I still don't know codes for Capital letters.

Rich