http://forums.cnet.com/5208-7582_102-0.html?threadID=290766

Look down at the last post. There is a solution that works. I just tried it and was able to type a shifted character. It’s a bit cumbersome to use, since it is a separate little window, but it does the trick.

Here is the solution I found at the above link:

“SOLUTION TO OSX ONSCREEN KEYBOARD STICKY KEYS!!!!
by John A. Collins – 1/12/10 8:09 PM In reply to: Another Solution by Colin Pye

Use Finder to navigate to the folder > System > Library > CoreServices > Menu Extras, and double click on the file ‘Ink.menu’. This will cause an Ink icon to appear on your menu bar. You can use the drop down menu to access Ink Preferences and turn Ink on. Also check the “Show Ink Window” check-box. This is a little window with modifier keys that stick once or lock down by double-clicking. Combine this with the regular onscreen keyboard and you have a mouse-only solution for all your text input needs. Why Apple failed to include sticky keys by default I will never forgive. Please, If anyone knows a good place to post this info where it will be most helpful, let me know or go ahead and do it.
PS this also works great if you want to use a touchscreen-only setup.”

http://wp.me/plSRO-16x

Here’s the best free keyboard I have found so far:

http://www.schoolfreeware.com/Big_Screen_Keys.html

The modifier keys act sticky by default and the keyboard is resizeable by dragging the corner handle. Resize does not restrict the aspect of the keyboard, it just stretches and squeezes to fit the dimensions you set for the window.

I have two complaints:

– the keyboard can’t be minimized or hidden to get it out of the way between uses. the choices appear to be to close the application entirely or try to shove it out of the way until i need it again. Since I’m already short on screen space because of extreme zooming, this gets tiresome.

– the keyboard was optimized to look good set very large but shows some rendering problems at smaller sizes. When set to the size of apple’s keyboard viewer, this keyboard looks pretty rough.

What can I say. The Sun never sets on my influence.