-To answer your question, I only use Metasequoia. Sorry, I'm too lazy at the moment, and worked up to go search for the link. Whoops, just instinct, had to go search it, sigh...Here ya go:
http://metaseq.net/english/index.html
-To go free, you can download the free version
-If you want more options, go get the paid version.
And yes, I do know of a model of the Gundam Freedom, go visit the Sketchup Gallery:
http://sketchup.google.com/3dwarehouse/
Hope you have better luck than me, I already tried unfolding it, didn't come out as great as I expected..
Trust me, just use Meta, start from scratch. Metaseq. is so easy to use, and I'm not just saying that, it's a simple project. You can draw lines, then extrude, knife, to mold pieces. Or you can simply use primitives, that can EASILY, yes, EASILY shaped using the move/extrude/ bevel buttons.
Sorry about the off topic post, anyways, back to Virtue...