You see the "square" icon i selected in the image? thats the scale tool, simply select all the meshes, hold down the left mouse button and drag the mouse in the viewport, watch the units at the bottom until you reach 125.
Also i mentioned 125 but that's from memory...to get a perfect scale use Kyle's mesh as a reference:
By the way how come your glm importer works in max 8? i thought it only worked in version 6. I tried it with max 7 and it wont work either.