You can VERY easily use an ep4 client and add EVERY piece of ep6 into it without any of these stupid "hp errors" etc. Like i said if you used your own advice and read what i wrote.
There are multiple releases in the dev section with "ep6 client" armors / icons etc. They are in the 1st page mostly so it's not hard to find them. There have also been multiple posts on how to put those into your own server (be it ep3,4,5,6) whatever you wanna call it.
All me and Snuggle are saying is.. If you want ep6 content, stop trying to work with the ep6 releases cuz you WILL NOT get it working. Start with a stable ep4 (cuz that's the best we have) and add the content in to make it as close to ep6 you can get. You can "copy" the interface in ways to make yourself have ep6 look on ep4 game.exe etc. It's not all that hard, you just can't expect it to be done in 1 day. I know i've done it and to do it PROPERLY your talking at least a week of work.
As an addition to what your asking but don't seem to know how to use search/or the index to find anything.
[Only registered and activated users can see links. Click Here To Register...] - I find this the best for setting up the server. (you need 2012 or 2008 i believe sql to install it tho)
There are other server setup releases too if you prefer another approach.
[Only registered and activated users can see links. Click Here To Register...] - Here are a selection of game.exe's if you want to change the level yourself or anything like that, there are guides to do that too.
[Only registered and activated users can see links. Click Here To Register...] - for dupe fix
[Only registered and activated users can see links. Click Here To Register...] - If you want ep5 skills able to work on your server (you will need to fix them still, refer to brain.exe for instructions)
I could go on all day posting link by link what is in the dev index already.. that is why John made it, so people like you with questions and concerns have all the answers right there in 1 click.
[Only registered and activated users can see links. Click Here To Register...] Everything you need is there, it's not hard to figure out, but if you really still can't get ep6 content into a ep4/5 client, then post here and i will give you a step by step guide on EVERYTHING you need in order to do it.