Googlade lite för att se om jag kunde hitta några konverteringsregler men fann detta:
http://monstersandmanuals.blogspot.com/2008/09/becmi-planescape.html
"One thing I've often thought about is making a BECMI D&D version of Planescape. It wouldn't require a heck of a lot of work at first glance; alignment is easily expanded on from the Law/Neutrality/Chaos three-way matrix, and things like hit dice and armour classes don't really change. The only major task would be reworking the races and classes - but as soon as I start to think about that, I realise that it in fact the whole thing is a heck of a lot of work.
It's also a bit intellectually dubious, really. I like race-as-class in BECMI because it's part of the humanocentric viewpoint encouraged by the designers. There might be dwarf clerics and elf thieves and halfling druids, but they are otherworldly, remote, and fantastical. The only dwarves, elves and halflings who humans regularly encounter are the occasional, and highly unusual, adventurer - who is always of a certain archetype because the others of his or her race just don't go adventuring.
Planescape isn't humanocentric, though; and moreover it is infinite. The BECMI view that dwarf clerics (or whatever) do exist but never adventure doesn't work with Planescape because in infinity anything is more or less possible. There will be one adventuring dwarf cleric somewhere given that there are an infinite amount of dwarven clerics. (The true possibilities of infinity are, I fear, never properly realised in Planescape. I'm going off on a tangent here that I'll probably expand upon in another entry, but in the multiverse, it should be possible to encounter literally anything that is possible; it is the one place in, I believe, all of roleplaying where the Infinite Monkey Theorem could be put into practice. See this old entry for more thoughts on such matters.) This is even truer with level caps: you're telling me that in an infinite multiverse there isn't a single dwarf who ever reached level 20?
Nevertheless, it seems like a fun exercise. What would tiefling, aasimar, bariaur, modron, genasi, githzerai and planar half-elf classes be like? What would their spell lists and saving throws be like? What about their abilities? And what about factions?
All thoughts I which I ruminate over in idle moments."
Frågan blir då: ska man försöka köra som så att om springer man på en SLP eller om en spelare vill köra, säg en aasimar cleric, så använder man bara aasimars förmågor och sedan går man efter vanliga prästnivåer.
