A Basic Color Management Question

As a newbie to the realm of color management, I certainly could use some basic advice.

I recently color-corrected & repaired several old family photos in Photoshop Elements on my NEC display which has been calibrated & profiled. However, when I open these images on my wife's computer (for storage in her photo library), the colors are over-saturated with extreme color casts.

What must I do to be assured that the images displayed on other computer screens will (at least closely) resemble the original?

Thank you kindly for any help.

Far from knowledgeable about this but is your wife's monitor calibrated?

I don't think they will look right elsewhere unless the monitor it is displayed on is calibrated too.

Point well-taken. My dilemma, however, is that I have a SpectraView II puck/software (that is a tweaked Eye One Display II puck) for use on specific wide-gamut NEC displays only. I am reluctant to buy another colorimeter for her computer since color management is not critical on that computer.

Might there be any other alternatives to tweaking the display settings on the other computer such as on-screen settings or using test images? What about using one of the images that was post processed on my NEC display as a test image?

I know what I am asking is a crude substitute for proper calibration.

Thank you for any help you can offer. I appreciate it.

As the OP, let me apologize for not having carefully thought out my question beforehand. Let me re-state my question a bit differently. Thanks for being patient with someone who is climbing up the learning curve of color management.

I am using Photoshop Elements to post process my images on a MacBook Pro with an external NEC P221W display. The NEC has been calibrated & profiled using the proprietary SpectraView II puck & software. There appears to be 2 issues with which I could use some help.

Issue #1: First I will process an image with PSE on the NEC display. If I drag the image (while still in PSE) to the MacBook Pro's built-in display, the colors tend to be over-saturated & often with a color cast. Is this a problem of the built-in display not being calibrated?

Issue#2: Although I process my images in PSE, I organize & store them in iPhoto '09. If I open an image that I stored in iPhoto, the colors in the image are over-saturated regardless of whether I view them on the built-in display or the NEC display. My question is: what can I do to assure that images processed in PSE will retain the same color balance (if that is the correct term) in iPhoto?

I assume that iPhoto is a color-managed application. If so, is there some tweaking that I need to do?

And, thanks for your patience & any help you can provide.