Changing partition sizes on dual boot disks.

[JD]

Hi all.
I have a dos partitioned drive.
partition 1 has windoze
there is no partition 2 (it was deleted and it's space added to partition 1,
using the old software called "Partition Magic".
partition 3 is fedora
partition 4 is fedora's swap.

Fedora partition is only using 3% of it's available space:
$ df -k /
Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/sda3      903432024 24820728 832696536   3% /

$ df -k /sda1
/dev/sda1        42015740   41972804      42936 100% /sda1


Can parted handle
     1. shrinking partition 3 (i.e. starts at a numerically higher block 
number)
     2. fixing the installed grub so that I can still boot fedora,
        or would I have to boot a live fedora and install grub from
        live fedora?
     3. adding the freed space to partition 1 so that windoze can
        see it and use it as part of it's partition 1?

P.S: I will be backing up sda3, so no fear there. Ditto with sda1.
Thanx.