Hrm, I used to have the official PDF file for converting when 3E first came out, now just have a print out of it, unfortunately.
Most of the booklet isn't really needed, as it just names the conversions of magic items and spells, which one can glean for themselves easily enough.
There are a few variants for conversion of other stuff, but nothing completely hardcore and set, as a streamlined, "point for point" conversion is not possible. The only hard core rules they gave for conversion were ability scores and levels, which I'll post below.
In the end, when we converted our characters, we just kept the ability scores and levels, then built them in 3E from the ground up as far as skills and everything else goes. Was much easier that way. All ya have to do is keep along the characters premise as you had him before converting.
Anyway, all the ability scores remained the same when converted, except for Strength. If you had an 18 with exceptional rating (i.e. percentages) through a 25 STR, refer to the numbers below:
18/01 - 18/50 = 19
18/51 - 18/75 = 20
18/76 - 18/90 = 21
18/91 - 18/99 = 22
18/00 = 23
19 - 20 = 24
21 - 22 = 25
22 - 23 = 26
24 - 25 = 27
Yes, they screwed up on the 22 rating, posted it twice, which we just kept the 21-22 column as is, made 23-24 convert to 26, and a 25 convert to 27. I believe that was their intent, anyhow.
You would then add in one discretionary point per four levels to your converted ability scores, as normal for 3E.
As for level conversions, pretty simple. Keep all the levels from your highest level class (this is taking into account that you are multi or dual classed), then add onto that number 1/3 of the class levels from each additional class.
So, for example, if you were a fighter 15/priest 6/psionicist 9 your total character level in 3E would be 15 + 2 + 3 = 20.
Then you simply toss whatever classes you wanted into those 20 levels, following normal restrictions (i.e. alignment restrictions, prerequisities for prestige classes, etc). Didn't even technically have to use any of your original 2E classes, but if you didn't, wouldn't really be the same character
This method rounded off your actual xp numbers quite a bit, meaning you could "lose out" and not be as close to gaining another level as you had been, so they added a formula in for converting exact amounts of xp (or closer to it anyway), but not typing that convoluted crap out right now.
As you can see, in converting you lose out a LOT of levels, considering that you could have several classes with fairly high levels in 2E (especially in Forgotten Realms campaigns, where you could go up to 40th level in any given class).
I can see why they cut it down, as everything did not stack up (hit points, THACO, saves, etc) in 2E like it does in 3E, but still, I for one, and most of my players at the time, could not stand the thought of losing out so much, so we scrapped that conversion rule, and kept our total amount of levels.
True enough, it was a tad chaotic until the epic level rules came out, but we made it work all the same. Now there are epic rules available, so converting in such a way isn't a problem. Just makes for some very powerful characters in comparison to the npcs and such listed in all the 3 and 3.5 gaming sourcebooks. More work for the DM, but great for power-trippy players
The booklet went into more little details and suggestions for converting, but that's pretty much all you really need if you are familiar with 3 and 3.5 E
....well any ways me and my friends have always wanted to convert it to 3rd edition never getting around to it cause were fing lazy asses...well...thats all i had to say i guess 
;D 
