Changing hard disk partitions

[Paul Moore]

I've just initialised the 140 Mbyte hard disk on my ISC-based system, as
follows:

       DOS Partition
       UNIX Parition:
          /
          /usr
          /usr2

and then spent 4 hours copying software into the root and /usr file systems.
While loading the last piece of software into /usr, I got the message that
there wasn't enough space left in /usr. Definitely a case of Murphy's Law
raising its ugly head!

Without re-initialising the disk and re-loading the software already loaded:

1. Can I increase the size of /usr at the expense of /usr2?

2. Can I vary the relative sizes of the DOS and UNIX partitions, or even remove 
   the DOS partition?

3. As an aside, any suggestions as to reasonable proportions for sizes of 
   UNIX file system partitions?

Thanks, PPM