1) It's double portable build (1.7 folder inside 1.6 folder) - it was conceived that 1.6 is the main browser and 1.7 is secondary one on demand (sometimes it renders sites more correctly, but 1.7 branch still has more crucial bugs)
2) It's based on 1.6beta2.5 from JamesD and db+ builds from dugbugoffice. No new binaries - we still need C++ coders and this is problem
3) But KM Twin+ has all the modern compatibility thanks to incorporated GoogleChromeFrame. This part of pack was inspired by disrupted's work.
Now, you can install ChromeFrame by pressing just one button on toolbar (with blue Chromium icon) - simply press and answer 'Yes' and 'OK' to get it installed.
Next time you'll start KM the same button will open currently opened page in new tab inside KM with Chrome engine!
No more incompatible pages!
4) Other original stuff are
the Icon Selector toolbar, which lets you to select 1 of 7 icons for you KM (you can assign 2 different icons to Twins in order to distinguish them easy in simultaneous work (when you open 1.7 from 1.6 - new window is created, so you can use two different KMs in parallel);
button to quickly switch opening diverted windows/tabs from fore- to background (corresponding bug is now fixed in kmprefs.jar)
Privoxy webfilter is here to replace AdBlock in KM-1.7 or even add more content filtering power for KM-1.6. The only one drawback of using Privoxy is that it prevents you from using Keyword Autosearch and thereby it blocks the possibility to open pages by simply typing some peculiar keyword in URLbar and hitting Enter (my favourite trick in KM!)
upgraded AppLauncher (by disrupted and Alex Tarantul) which has now button for every App (IE, Mark text editor and KM1.7). Feel free to add more other apps by changing kmm-file! But remember - you'll need bmp-icons!
More useful stuff are bookmarklets - 5 different online bookmarking services (highly recommended to add site to your cloud bookmarks by 2-3 clicks!) and about 20 different JavaScript-tools for some useful (or just funny) operations with pages and content.