SE navcores can run in different 'modes': showing the screen of a specific TT model. extract a SE basicpack onto flash (without basicpack, include step 8) 5. make a file with in it the current official navcore version for your TT (write in the root of your internal flash), e.g. will magically transform into three ttgo.*'s when booting. make a file with in it the TT model you want to see (mode), e.g. navigate, add voices, and start tweaking Dark Mireille makes ME navcores, comparable to SE navcores. One function, apart from loading and running the navcore, is SD-Card support (to load the navcore from it). The bootloader is the file 'system' in the root of your TT.
Which modes are available depends on what Tom Tom includes in the navcore and the magic of TTuser. x50, x40, x40light, x30, x20, ori (see and this site) Use 'ori' to get the original look for your device. if you like, extract the original navcore-CAB file to internal flash, but do not overwrite any file, and remove 'system' (use Win RAR) Without basicpack, get the splashscreens (*.bmp) from your backup. A second function is USB support, to get a navcore onto your TT. Using the incorrect bootloader can stop your TT from functioning. When you upgrade via HOME you will have a correct bootloader. XXX' in it , you can rename it to 'system', and it will be installed on your TT if the version is higher than the one you already have.
Replace your old zip folder with this one (or replace the contents with the new contents).
...however please note that the version on the forums may be actually OLDER than the official Tom Tom version, so for now only use the Tom Tom link or your device will not be able to find postcodes for new properties.
A safe mode to start with is the native mode ('ori'): a navcore for GOx50 on a GOx20, running in x20 mode (colors, icons, etc.). If you use a Tom Tom file that has 'system' in it: remove it. The fixed flash in your TT is limited to 0/512/1024/2048/4096MB, depending on the model (GO700 & GO910 models have a real hard-disk on board). The navcore takes about 100MB, 220MB if you use computer-voices etc.
This means that you need to copy the content of your TT to this card, or do a completely clean install.
Know that all models within one range are almost identical, e.g.
GOx30: 530, 730 & 930 are almost the same: the differences are flash size and EPT in the 930 (the GO630 is the odd one out). The GOx50 is like GOx40 (and the GO9000), the most most noticeable differences are FM & MP3, which are left out in the x50. The One series has differences within the series, as well as the XL series. ": TTuser makes hacked versions of the different navcores for special needs.
Add these two values, add 3%, and you have the minimum storage need.
You now must make a choice: do I use an SD card or not?
They have 32MB RAM instead of 64MB in the other models.