Running VirtualBox VM host on ReadyNAS Pro

OK tried VB install but no luck so far. I think I have filled up the Root partition and would like to know what I can safely delete. Here is a "du" output.

nas-EA-33-DF:/# du --max-depth=1 -h -x
16K ./lost+found
1.7G ./GPL
3.1M ./bin
0 ./sys
0 ./ramfs
4.0K ./mnt
6.7M ./etc
28K ./tmp
0 ./USB
11M ./lib
480K ./__MACOSX
420K ./_READYNAS_CONFIG-1
4.0K ./c
4.0K ./initrd
3.8M ./sbin
11M ./frontview
28K ./root
0 ./dev
2.4M ./opt
217M ./usr
0 ./proc
111M ./var
16K ./.Dekoh
228K ./home
2.5G .
nas-EA-33-DF:/# cd /GPL
nas-EA-33-DF:/GPL# du --max-depth=1 -h -x
36M ./apache2-2.2.6
128K ./pwauth-2.3.6
476K ./sysklogd-1.4.1
368K ./mktemp-1.5
84K ./libfile-remove-perl-0.31
68K ./libtext-wrapi18n-perl-0.06
3.5M ./rsync-3.0.5
2.7M ./bzip2-1.0.3
20K ./libreadynas_lgpl
544K ./libhtml-parser-perl-3.55
1.1M ./iscsitarget-0.4.17
355M ./linux-x86-2.6
3.5M ./bash-3.1dfsg
644K ./liburi-perl-1.35
4.0M ./iptables-1.3.6.0debian1
1.9M ./libevent-1.1a
5.6M ./openssh-4.3p2
756K ./libedit-2.9.cvs.20050518
23M ./libxml2-2.6.27.dfsg
14M ./flac-1.2.1
3.5M ./lvm2-2.02.06
4.1M ./libgd2-2.0.33
1.6M ./mdadm-2.6.4
2.9M ./sudo-1.6.8p12
1.1M ./vlan-1.9
1.1M ./pciutils-2.2.4~pre4
104K ./libdevel-symdump-perl-2.03
2.4M ./smartmontools-5.38
308K ./base-files-4.0.1~bpo40+1
92K ./lcd
340K ./miniupnpd
44K ./gpio
2.4M ./libmad-0.15.1b
14M ./busybox-1.7.0
1.7M ./libdbi-perl-1.53
1.5M ./gzip-1.3.5
3.6M ./zip-2.32
600K ./ethtool-5
264K ./portmap-5
20M ./cupsys-1.1.14
18M ./proftpd-1.3.2
14M ./shadow-4.0.18.1
3.1M ./ntfs-3g-1.2531
340K ./hdparm-6.9
1.3M ./mawk-1.3.3
48K ./debian-backports-keyring-2007.06.10
536K ./host-20000331
208K ./makedev-2.3.1
8.4M ./cyrus-sasl2-2.1.22.dfsg1
200K ./libnet-daemon-perl-0.38
73M ./gcc-4.1-4.1.1ds2
2.7M ./expat-1.95.8
2.0M ./slang2-2.0.6
11M ./tar-1.16
424K ./ucf-2.0020
484K ./at-3.1.10
1.5M ./libnfsidmap-0.18
10M ./libapache2-mod-perl2-2.0.2
696K ./udev-0.105
664K ./debianutils-2.17
4.3M ./devmapper-1.02.08
308K ./netbase-4.29
5.9M ./unzip-5.52
5.9M ./libvorbis-1.1.2.dfsg
11M ./fuppes-4.01c1-p3
256K ./mod_authnz_external-3.1.0
224K ./libapache2-mod-auth-pam-1.1.1
1.2M ./wireless-tools-28
9.8M ./netatalk-2.0.3
4.2M ./nfs-utils-1.1.2
2.8M ./libjpeg6b-6b
1.2M ./readynas-x86-kernel-modules
61M ./perl-5.8.8
15M ./ncurses-5.5
7.4M ./findutils-4.2.28
688K ./zlib-1.2.3
112K ./lvm-common-1.5.20
24M ./gnutls13-1.4.4
50M ./db4.3-4.3.29
3.1M ./file-4.17
60K ./debian-archive-keyring-2007.07.31~etch1
2.4M ./popt-1.10
2.3M ./gdbm-1.8.3
588K ./nv6memtest
3.4M ./libsepol-1.14
148K ./libplrpc-perl-0.2017
17M ./dpkg-1.13.25
63M ./samba
19M ./glibc-2.3.6.ds1
828K ./grep-2.5.1.ds2
1.7M ./db3-3.2.9+dfsg
240K ./acpid-1.0.4
648K ./iputils-20020927
4.3M ./libexif-0.6.16
260K ./base-passwd-3.5.11
5.7M ./exim-3.36
424K ./dosfstools-2.11
56M ./db4.4-4.4.20
4.8M ./wget-1.10.2
3.0M ./ncftp-3.2.0
436K ./logrotate-3.7.1
2.9M ./libid3tag-0.15.1b
124K ./libident-0.22
2.7M ./tzdata-2008h
1.6M ./ifupdown-0.6.8
120K ./liblocale-gettext-perl-1.05
168K ./libnet-netmask-perl-1.9012
4.5M ./apr-util-1.2.7+dfsg
96K ./ddrescue-1.10
1.9M ./libusb-0.1.12
6.2M ./nv6bootloader
876K ./sysfsutils-2.1.0
168K ./mime-support-3.39
8.2M ./apt-0.6.46.4
4.3M ./libpng-1.2.15~beta5
4.7M ./libgcrypt11-1.2.3
2.2M ./libogg-1.1.3
68K ./hostname-2.93
888K ./minidlna
16M ./ffmpeg-debian-0.svn20080206
396K ./cracklib2-2.7
1.4M ./sysvinit-2.86.ds1
96K ./libfile-ncopy-perl-0.34
688K ./libpci2-2.1.11
1.7M ./libdaemon-0.12
2.5M ./opencdk8-0.5.9
2.0M ./tct-1.11
12M ./sqlite3-3.5.9
3.3M ./cpio-2.6
1.5M ./net-tools-1.60
4.1M ./gphoto2-2.2.0
5.5M ./mt-daapd
4.7M ./libgpg-error-1.4
6.2M ./apr-1.2.7
25M ./net-snmp-5.2.3
948K ./noflushd
4.4M ./lzo-1.08
468K ./udhcp-0.9.8cvs20050303
76K ./libtext-iconv-perl-1.4
11M ./ntp-4.2.2.p4+dfsg
1.2M ./libwww-perl-5.805
2.2M ./librpcsecgss-0.17
21M ./openssl-0.9.8c
88K ./libhtml-tagset-perl-3.10
1.4M ./procps-3.2.7
23M ./e2fsprogs-1.41.3
14M ./openldap2-2.1.30
16M ./util-linux-2.13.1.1
348K ./libcap-1.10
912K ./tftp-hpa-0.43
2.4M ./iproute-20061002
49M ./krb5-1.4.4
3.4M ./diffutils-2.8.1
5.2M ./libapreq2-2.08
4.9M ./libtasn1-3-0.3.6
1.7M ./freetype-2.2.1
2.3M ./libgssglue-0.1
1.9M ./libdvdread-0.9.7
612K ./libdbd-mysql-perl-3.0008
6.1M ./readline5-5.2
472K ./cron-3.0pl1
4.3M ./linux-atm-2.4.1
12M ./postgresql-8.1-8.1.11
640K ./attr-2.4.32
196K ./openbsd-inetd-0.20050402
5.0M ./nut
508K ./tcp-wrappers-7.6.dbs
2.8M ./msmtp-1.4.9
1.1M ./mdadm-2.6.7
132K ./memtester-2.93.1
2.4M ./iscsitarget-0.4.16+svn162
4.5M ./sed-4.1.5
11M ./libidn-0.6.5
1.1M ./ifplugd-0.28
18M ./gnupg-1.4.6
31M ./db4.2-4.2.52+dfsg
84K ./libtext-charwidth-perl-0.04
64K ./dd_rescue
28M ./squeezecenter-7.3.2
89M ./mysql-dfsg-5.0-5.0.32
1.5M ./adduser-3.102
68K ./update-inetd-4.27
3.6M ./libselinux-1.32
20M ./libgphoto2-2.2.1
16M ./busybox-1.10.1
5.2M ./lm-sensors-2.10.1
928K ./bvi-1.3.2
7.0M ./dbus-1.1.2
5.8M ./faad2-2.6.1
496K ./libhtml-tree-perl-3.19.01
264K ./lsb-3.1
12M ./gsasl-0.2.12
1.1M ./acl-2.2.41
5.2M ./pcre3-6.7+7.4
2.0M ./wizd
5.4M ./coreutils-5.97
1.5M ./quota-3.14
6.9M ./avahi-0.6.21
3.4M ./debconf-1.5.11etch2
456K ./module-init-tools-3.3-pre4
3.5M ./pam-0.79
1.5M ./psmisc-22.3
1.7G .

Looks like GPL has a bunch of extra stuff. Any thoughts on what to delete?
Thanks,
BigBearf