Is it possible to load multiple saves into one blend?
and how
Q: How do I 
move meshes/lamps/materials/anything 
from one save to another?
A: It is called 
appending and it is really easy. In the main toolbar go to File > Append, find your save and open it. Inside the save there a multitude of folders, but what you need is the "Object" folder which contains all the meshes in the save. Of course 
appending other things than meshes work too. Open the Object folder, select all the meshes you wish to append and press the 
Link/Append from Library button at top right.
How do you tell if something is to scale with the Blockhead?
This: 
http://forum.blockland.us/index.php?topic=119849.0I think I might have said that wrong.
What happened Demian is that I rotated it, and saved it thinking it was aligned with the grid.
It wasn't.
How do I get it aligned with the grid, where the lines aren't skewed.
Q: How do 
snap a mesh/parts of mesh to 
grid?
A: I highly suggest you go to 
Ortographic view mode by pressing 5 on the 
numpad once or twice then to front/right/top view with 2, 3 or 7 on the 
numpad. (Note: If you do not have a 
numpad, get one. Or change the view with the 
View menu in the 
3D view menu.) Now select your mesh/part of your mesh, press 
Space, search for 
Grid and select 
Snap Selection to Grid. Please no that this can be to single vertices too.