hi all, i posted this on blitzcoder aswell but i thought it might be usefull to some people here, i just found what seems to be a pritty good freeware modeler online, i havnt worked with it much yet but its just in its begining stages and being updated very quicly, the biggest problem with it is its lack of a manuel but if you want to give it a go here it is...
http://aztec.sourceforge.net/aztec.php?page=news
http://aztec.sourceforge.net/aztec.php?page=news