Program: Trillian
License: Free but not open source(Basic version)
Description: Universal Instant Messenger
Website: http://trillian.cc (official)
http://www.trilliananywhere.com/ (Trillian portable.)
Other: http://www.trilliananywhere.com/ has a step by step page on how to do that, but I found it would be much more conveniet if it were possible to make like Firefox portable, a patch on the original software.
It's already available for U3 technology, but I distrust U3 and I prefer to install it in some non U3 compatible devices such as network drive and/or convetional hard disks (with USB interface or Serial Ata drives)
Thanks guys, Portableapps is much better than U3