0) Unplug the interface and make sure it is not plugged in until the very end.
1) Run the main installer, after it installs, launches Diagbox and prompts to activate, exit the app without activating.
2) Extract Lexia.rar to C:\, extract PP2000.rar to C:\, extract PPDIAG.rar to C:\APP.
3) Copy the file PatchV6 to C:\AWROOT\BIN\FI\CACHE, double click to launch it from there, press patch, it should come up and say that its patched successfully.
4) Launch diagbox, choose manual activation, enter:
customer code: scary01
activation: 12345678901234567890123456789012
Profile: 02ffffff
Address: *
Postcode: *
Car Phone: 0
Diagbox 6.01 should now be working. For updating I would recommend to stay away from the built in internet updating feature and download scarymistake's updaters...
For each update you run the updater which then prompts to reboot, after rebooting launch diagbox and it will apply the update. Once the update is applied exit diagbox, and if you have further updates rinse and repeat.
After you're finished everything but before you plug in the interface, open a file in notepad called:
C:\AWROOT\BIN\LAUNCHER\AP
It should be a text configuration file, near the beginning find the line MAJ_COM=TRUE and change it to MAJ_COM=FALSE then save the file.
Only now connect the interface. When using Lexia, launch Diagbox with the interface connected, however just before you press the Lexia button unplug the interface and plug it back in.
Hope that helps.