How can i dump the maps? I can't enter in testmode or something similar... 
@condiczek: Any ideas?
I'm sorry friend, no other ideas how to help you.. Check all the versions of testmode available in the internet,
check that 4shared collection, for our devices GGS1080 work, maybe other version will work for you!
Condi, where do we stand on finding out the process that is capturing that port?
All guys here are doing great job, we all are working to find the solution!
So we can beat them up for developing horrible software 
Thanks for the hardwork so far. Its much appreciated!
I'm going to try this on my x920 soon. I also dabble into SW dev (usually for servers) but im going to take a look at this.
Everyone is welcome to help! All the work/research is appreciated 
I've got read.img file from memory and using ImDisk Virtual Driver can mount them to my PC but
it shows 2 unmounted partitions, and if I mount any of them it says that drive is not formated.
Fat32 partitions can be mount as normal drives.
We do not know which port is our GPS antenna uses.
We do not know which module keeps this port occupied.
About our mysterious unmonted partition:
I have it in separate file, but I have problem to upload it here.
so here a link to 4shared.
hidden partition files contain:
00000000-00100200-EU090RGD.bin (3rd copy of EU090RGD.PRG like in USER\PRG0(1)\PLATFORM)
00100200-03144600-EU090PLT.bin (3rd copy of windows image!!!)
03144600-03200000-EU092OPN.bin (welcome screen - 16 bit BMP without header)
03200000-03300200-EU090RGD.bin (4th copy of EU090RGD.PRG)
03300200-06344600-EU090PLT.bin (4th copy of windows image!!!!!!!!!!!!!!!!)
06344600-06400000-EU092OPN.bin (welcome screen - again!!!)
I have welcome screen customised so this welcome screen is exactly the one unit uses.
Bad thing we have no EU090BOT.PRG or/and configs of the unit.
May be it is another hidden patition somewhere?
Why this dump is less then entire 4GB chip volume?
Where is lost 143,130,624bytes?
ImDisk shows another unmounted patition at the end of the drive (check image before) Partition4! but it has 0 length. May be DiskRW didn't copied entire image...
Im almost sure that gps port is com7!
GREAT work friend
We are getting closer day by day!
If there is no EU090BOT.PRG bootloader, then maybe after getting corrupted EU090PLT.PRG, or even deleted - it should still be repairable, maybe even testmode working?
We can still look into /NAND/PRG0/BOOT/EU090BOT.PRG 
About your list of partition content - .bin files are repeated, doubled, because of PRG0 and second PRG1 copy. One set of RGD+PLT+OPN in PRG0, and another one in PRG1. To get windows in full working condition we need to replace system resources, the most important is coredll.dll, commctrl.dll etc.
coredll.dll is in RGD part.
I've got another idea how to get fully working gps/audio etc.
RGD contains: AstProc.exe, nk.exe, coredll.dll, ceconfig.h and snapshot_secureos.dat.
We need to replace coredll.dll, and maybe edit ceconfig.h to get full working windows ce, and..
the main idea - make copy of AstProc.exe as AstProc1.exe, replace AstProc.exe with mortscript with some condition - for example: if hackmode.key exists on sd - then run explorer, else run AstProc1.exe. Similar as now with hackmode. We should take a look into AstProc.exe - maybe some IDA Pro analyze etc.
I will upload complete dumped AstProc.exe and NEventWatcher.exe (not corrupted/shortened like from dumpromx.exe) later, but now my sdcard-reader isnt working.
---edit:
attached interesting not corrupted - complete rom files like: coredll.dll (which is limited in our wince), NEventWatcher.exe, TestMode.exe, and device dlls NP....dll, NPCommonLib.dll, NEventBaseLib.dll etc.
romfiles.zip