Birthday Party and Problem Solving

UZZAH! So far the very unexpected number of 11 guests out of 13 invited have pushed the "I'll be there" button on the Facebook page. I say unexpected because a) 7 of the 13 invited have no experience in roleplaying games at all (and two have played Call of Cthulhu but once, one has played Call of Cthulhu once and D&D in a solo-game with me twice, my brother used to play D&D with me when we were just kids, one has played but only a home brew rpg and regularly plays in a Play by Chat game, one used to play D&D but 3rd edition and never played with me) and b) none of them look like potential D&D players (sure, two of them study mathematics with me at university, and one of the girls studies physics, but you'd be surprised to see how many supposed geeky people are not that geeky at all). Also, none of them have experience with MMORPGs and any other variant form of RPG. They are, by the way, all avid players of Munchkin (and this is because of me).

I'm not scared by the potential amount of players (the more we are the more the awesome), neither by the fact that nearly a third of the group is composed of girls (girls play way better, you try) or by the fact that half the group is going to be composed by total noobs. But there's something that scares me: the one guy who used to play 3rd edition D&D (he said "Cool I haven't played for years I want smash some motherfucking goblins I want to play a Half-orc Barbarian yes kill'em all!" without breathing), he is a real enthusiast, although I know for sure he is not a rule lawyer – just a guy who happened to have some fun playing D&D.

Therefore, I have some concerns in running a straight Labyrinth Lord game, for I don't want to say to the only person at the table who happens to have a rough idea of the game we are about to play "Sorry, you can't play your Half-orc Barbarian because I haven't got it in my rulebook". Nor do I want to say to him "forget the saving throws and to hit as you remember them, because we will be playing something else". And definitely I'm not saying both the above things at the same time. So what to do? Going with 3rd edition looks difficult, for I don't want to have them run pre-generated characters (rolling up a character takes 5 minutes in Labyrinth Lord, and I know from previous experiences with noob gamers that rolling up the character is definitely a necessary step), and running 3rd edition without talents, skills and using first edition spells scares me, for I never tried such a thing. Still, the possibility of going completely authoritarian attracts me. Anyway, I have a couple of ideas ready to go, and perhaps I will have to reconsider them. I wanted:

1. Run Labyrinth Lord;
2. 4d6, drop the lowest, assign in order for abilities;
3. Non-variable weapon damage;
4. Standard equipment, but you get 1d6x10 gp;
5. No 1st level spell for Clerics, instead they can Cure Light Wounds;
6. No spells/day; instead, you memorize (reading or praying) a spell, cast it, then you can memorize (reading or praying) another (though it takes some time).

So far, the only possibility of solving this situation seems to be to adopt the Advanced Edition Companion and write up an easy peasy Barbarian class. Still, all the newbie players will have race as class. I will probably have to make some spell cards for the first level spells (for magic-users and elves), or something like that.