No takers eh. The easiest way to convert is to look at the Eflite line of motors. The name of the motor is what it is equivalent to in terms of glo, ie you would want to use Power 15's. Check the link, it will tell you everything you will need x 4.
[link]http://www.horizonhobby.com/Products/Default.aspx?ProdID=EFLM4015A[/link]

As far as watts/lb goes, scale flying for the Liberator would be around 70 to 75 watts. 100 watts/lb gets you a sport flier, over that will give you 3D power. I like to have 100watts/lb at least even though it isn't scale.