According to my experience this is a big problem, especially when you combine few different programs (Photoshop, Corel, I****rator, Inkscape etc.. ).
You probably will need specialized hardware for monitor calibration. For example
http://www.colorvision.com/product-mc-s2p.php
Also try to search on Google about other hardware products.
Also check this link
http://luminous-landscape.com/forum/...howtopic=10941