It is possible, it's even easier when 
/home is on it's own partition.
For this to work you need to select 
Something ElseAttachment:
			
			somethin_else.png [ 75.9 KiB | Viewed 57107 times ]
		
		
	 Then install the file systems to the partitions you wish.  Formatting only the root (
/) partition, and 
not formatting your
 /home partition, unless you really do want to delete everything.
Attachment:
			
			select_partitions.png [ 60.68 KiB | Viewed 57107 times ]
		
		
	 If this is not clear enough, let me know....