could you point me in a direction that I can find out about T/S & DUMAX(read about this in another post) values as I am doing Electrical Enginerring at TAFE and I am very interested to learn more about this stuff

You could read something like "the loudspeaker design cookbook" which is pretty good for newbies.

Here are also a few good links

http://www.klippel.de/default.asp
http://www.dlcdesignaudio.com/dumax.htm

http://sdf1.cc/~neowall/vas/phy.htm (wish I found this link earlier..)

Also, you may want to look under winisd help -> technical -> equivalent circuits

And also do a google on the equivalent circuits for various types of enclosures.

thanks dude