do you feel like reinstalling the whole system,if you want to use it for a different purpose it might not be such a bad idea ... otherwise you can try changing your /export/home partition into 3 partitions ...
to get the partition info type (as root):
format <return>
0 <return>
partition <return>
print <return>
quit <return>
quit <return>
and paste in the list of parts, blocks and sizes ... (produced by the 'print')