Thanks jaws. Nice program.

I agree with Nomadturk's post,

At installation stage, it asked me for what to extract, so far so good.
Extracted everything i've selected, that's fine though i had to see everything via ugly msdos interface. A novice user can close it with our without intention which i wouldn't want.

I made a fake 7za.exe (witch Quick Batch File Compiler) which runs un7zip.
The batch code i used is : (very simple isnt it tongue )

start /wait %~dp0un7zip.exe "%2" %SystemDrive%

You can download and extract this file to your %SOURCE%\OEM\bin
Tested on live system and everything is good.
Edit: Tested at installation and worked,too.

(Sorry if did an error, I'm not English)