So i decided to look at the difference between "cmsms 1.6.6 base" and "cmsms 1.6.3 base mle". It took me a while to copy changes from "1.6.6 base" to "1.6.3 base mle":
1. created "1.6.3 base to 1.6.6 base.patch" file
2. manually made changes from "1.6.3 base to 1.6.6 base.patch" to "1.6.3 base mle" file
3. and finally created "cmsms_patch_1.6.6_to_1.6.6-mle-diy.patch" file
During this process i used "TortoiseSVN 1.6.2", thats why empty characters were not ignored.
In addition i included my own mod to "/include.php" file ("//If default language was never set system will choose first avilable language") and to very top of "mle/function.mle.php"

I have instaled it to my local pc, also installed CGExtensions-1.17.4 and FrontEndUsers-1.6.10. Then i was simply browsing in admin panel (content , templates, GCB, news...).
No further testing were done. I know there are some bugs left in this HACK. The worst thing you could do is to use it for production. I am asking community to test operation with different modules and to give some feedback to forum.
http://video.placiau.lt/video/misc/cmsm ... se-diy.zip
http://video.placiau.lt/video/misc/cmsm ... -diy.patch
http://video.placiau.lt/video/misc/cmsms/todo.txt