Custom Kit.. Never done this before..

Hey ya'll,

Alright, basically.. I've been playing the Witcher 3, and, well, Ciri is incredible. So I've decided to try and create her in the Baldur's Gate series, and do a playthrough.

What I'd really like to do is create a 'Witcher' class kit (or modify an existing kit, if that is easier), using WeiDu. The thing is, although I've had a little experience modding other games, I've never even attempted it Baldur's Gate - so I've just got a couple of questions..

1) Say I follow a tutorial or something, and make a custom class kit for BG1, and it all works great, amazing - will that carry over to BG2 and beyond? Or would I have to duplicate the mod for BG2 aswell?

2) Do custom class kits have any inherent problems with them? Like, I don't know, breaking any quests, not having an xp limit.. I can't think of much else, but, basically, do I need to worry about them breaking my game at all?

3) Will EEkeeper recognise a custom kit at all? I use EEkeeper quite a lot to change character appearances and such, ideally I'd still like to be able to do that.

--

That's basically all, I think... My plan is pretty simple. I'd just like to add the generic fighter's THACO, attacks per round, and ability to reach grandmaster in certain weapons - to the Shadowdancer kit. It may be absurdly overpowered, but well, I don't mind that for a change.

Or in other words, I'd like a fighter who can hide in plain sight, who is limited to the rogue weapons/armor and HLAs.

I'd also like to rename 'Hide in Plain Sight' to 'Blink', and to make a different class description, and change the kit's name obviously.

None of the above will be too difficult to accomplish right?

Thanks very much for reading!