Moving 2gb from / to another ext2 already created partition

[Frédéric L . W . Meunier]

Hi. Can I do that without messing up my system?

/etc/fstab:
/dev/hda2       swap        swap        defaults   0   0
/dev/hda1       /        ext2        defaults   1   1
/dev/hda3       /usr/local/src        ext2        defaults   1   2
/dev/hda4       /home/ftp/pub        ext2        defaults   1   2
none             /dev/pts  devpts     gid=5,mode=620  0   0
none             /proc    proc        defaults   0   0

df:
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/hda1              9920592    462260   8946264   5% /
/dev/hda3              1984044   1009048    872584  54% /usr/local/src
/dev/hda4              2497584    506008   1862656  21% /home/ftp/pub

The problem is that when I installed this system on a (hda:
Maxtor 51536U3, 14655MB w/2048kB Cache, CHS=1868/255/63, UDMA)
I thought that 10gb for /dev/hda1, 128mb for /dev/hda2, 2gb for
/home/ftp/pub, and the rest for /usr/local/src would be fine.
But now I see that /usr/local/src needs another 2gb since not
all applications support --srcdir and I'd need to build for
example XFree86 and Mozilla directly on it.

-- 
address@hidden, com, dyndns.org}