It is a simple TAR in UStar format. Can be unpacked with any utility. The only problem i can imagine here is to repack it on windows since the package mentioned root as a user. This tar contains all the files of the firmware. The folder structure locks pretty the same for NEX and SLT firmware.
Root folders:
0100_config 0101_config_sum 0300_partconf 0301_partconf_sum 0630_cas 0631_cas_sum 0800_appli 0801_appli_sum
Full listing:
0100_config
mount.conf 0.53 Kb
0101_config_sum
config.sum 75 b
0300_partconf
partinf.conf 1.65 Kb
0301_partconf_sum
partconf.sum 77 b
0630_cas
AS_1_0.APP 224.00 Kb
CA_2_0.APP 448.00 Kb
0631_cas_sum
cas.sum 150 b
0800_appli
usr2
data
sound
scenarios
app_cwb_snr.esf 11.67 Kb
app_rec_snr.esf 37.71 Kb
app_uud_snr.esf 0.57 Kb
app_eps_rsf.rsf 12.13 Mb
app_repair_snr.esf 1.80 Kb
app_movie_rec_snr.esf 14.98 Kb
app_stg_snr.esf 33.87 Kb
app_hdmi_snr.esf 474 b
app_play_snr.esf 37.48 Kb
app_dlg_snr.esf 2.30 Kb
app_rhg_snr.esf 1.18 Kb
app_dds_snr.esf 487 b
app_usb_snr.esf 0.77 Kb
app_top_snr.esf 7.99 Kb
app_menu_snr.esf 5.80 Kb
BEEPDATA.BIN 318.25 Kb
boot
initrd.img 1.32 Mb
vmlinux.bin 1.29 Mb
rootfs.img 1.29 Mb
ex_conf_202.h 16.09 Kb
avsys
av.bin 3.04 Mb
sa_srec.bin 0.98 Mb
ancy_ipl.bin 10.40 Kb
ancy.bin 0.64 Mb
boot
GPS
factory
Asys.bin 28.00 Kb
initreg.bin 5.98 Kb
Hsys.bin 8.00 Kb
ex_cnf.bin 2.50 Kb
cas
CA_FROM.BIN 16.00 Kb
CA_FRAM.BIN 3.75 Kb
BRD.bin 0.90 Kb
backup
usr
log
bin
app
main.sh 1.04 Kb
deviceInfo.xml 0.51 Kb
main 16.31 Mb
haif.ko 5.84 Kb
serr.ko 5.58 Kb
main3.sh 0.76 Kb
mpr_monio 27.59 Kb
debugio 1.19 Kb
mpr_viewLog 21.83 Kb
memtool 6.96 Kb
sen 34.38 Kb
usr_up 0.51 Kb
testcmd 10.78 Kb
debugio_core 4.07 Kb
ud_datcnv 4.28 Kb
av_conio 11.45 Kb
up 4.81 Kb
lib
libadj30.so 14.91 Kb
libpro00.so 26.20 Kb
libadj33.so 16.02 Kb
libwtle.so 319.74 Kb
libSnr.so 7.88 Kb
libosal.so 27.26 Kb
libcmdcmm.so 31.96 Kb
libadj36.so 2.68 Kb
libBackupTable.so 325.12 Kb
libusbcmd.so 10.91 Kb
libul_debug.so 3.79 Kb
libadj32.so 21.42 Kb
libpro01.so 9.03 Kb
libadj31.so 18.58 Kb
libadj37.so 24.43 Kb
libul_xml.so 44.62 Kb
libpro11.so 20.87 Kb
libBackupCore.so 42.93 Kb
libusb.so 56.36 Kb
libdebugprintf.so 2.25 Kb
libgps.so 2.25 Kb
libadj34.so 4.59 Kb
libAppBackupApi.so 18.02 Kb
libupdatercommon.so 33.90 Kb
libsencore.so 114.58 Kb
libitype.so 220.21 Kb
libupdaterapi.so 97.59 Kb
libAppSenserApi.so 60.16 Kb
0801_appli_sum
appli.sum 7.64 Kb