Based on the discussion happening in the recent thread...

Okay, this was somewhat confusing at first, and there seem to be few people contradicting each other.  Now, I''m just going off of the Wiki, with the help of this thread, so bear with me, but I''''m going to put a step by step together, with pictures.

First misconception "Place MB (Mass Bias) at 45 degrees from grip center, Pap isn''t even needed!"  Wrong.  The MB (Mark 6 3/4" from the pin, through the CG (Center of Gravity) for Symmetrical Balls) is suppose to be layed out 45 degrees from your PAP (Positive Axis Point).

This is where I read about 80% of the confusion.  Granted there are many variations of the Rico Layout, but the tradition Layout is based on the bowlers PAP.

Before starting the Rico Drill, it is recommended to use a ball with a 3" Pin Distance, and a 2.5oz - 3.5oz Top Weight for ease in remaining within the Legal Statics.

Ok, now to the Step By Step with some pictures to help.
(Stolen Pictures, Sue me)  Don''t hate on my MSPaint skills either!

1: For asymmetric balls, draw a line from the MB to the Pin.
For symmetric balls, draw a line from the Pin, Through the center of the CG and make a mark at 6 3/4" and use this as a "Assumed MB"

2: Using a Pro Sect, and the Line from #1, make a mark at 45 degrees
3: Draw a line from the Pin, through the 45 degree mark above.  The ball should now have 2 lines, that create 1 single 45 degree angle.
Picture of Steps 1, 2 and 3: http://sports.webshots.com/photo/2722402190065372743zpOBLq

4: On the second line (Step 3) make a mark, based off of your PAP Co-ordinates.
My PAP is 5" Over, 1" Up, so I''ll make a mark at 5" (This will be different for everyone, as your Pap is unique to you.  The mark you make in this step, will be where your PAP is.
Picture of step 4: http://sports.webshots.com/photo/2759385210065372743sPVIBg

5: From the mark you just made (Your PAP) you will now swing an Arc, the length of your Vertical PAP Measurement.  Again, for me, this is 5" Over, 1" Up.  SO I will be swinging a 1" Arc DOWN.  (Make sure you swing the right way) <- That''''s what she said!
Picture of Step 5: http://sports.webshots.com/photo/2735381440065372743QNthwx

6: What the !@#$ is a Tangent?!? Well, in simple terms, just draw a Line, from the PIN, through the Swung Arc from Step 5, that only touches the Arc at one single spot.  Note that the line you are creating here, is actually your MIDLINE.  (Horizontal Line that travels through your grip center)
Picture of Step 6: http://sports.webshots.com/photo/2788455530065372743iOVWBz

Pause:  For those, like me, who need to see it to understand it, lets take a second to look at this last picture.  You can now see a few things.  First is you see your full PAP measurements and where your PAP will actually land.  This alone cleared up a lot for me.  The horizontal measurement is now actually out across the Light Blue line (Step 6) and the Vertical measurement is the Arc we swung, up to where we marked the PAP unknowingly before hand.
We also see that our Pap is 45 degrees from the Pin to MB line, and reading through the steps above, you find a, once you become familiar with it, simple way to lay it out.  Also, seeing the Midline, allows us to visualize the drilling as a whole.

Moving on...
7: Step 6 created your midline, so this step is pretty straight forward, Perpendicular from your Midline, you make a line both directions for your Center Line.  (Verticle Line that travels through your Grip Center)  Just in case... This is done, by creating a 90 degree angle, off of the Midline (Step 6), and then Drawing a line through that mark, that travels in both directions.  This is your center line.
Picture of Step 7: http://sports.webshots.com/photo/2307432850065372743tLKxGA

Step 8: From the Center Grip (Where Center Line and Midline Intersect) along the Centerline, take your Span measurements, and mark them out each halfway.  My span is 4 1/4 Cut to cut, so I go 2 1/8 each way.  Then I drill the fingers, thumb.

Step 9:  The weight Hole.  After taking static measurements of Top Weight, Side Weight and Thumb/Finger Weight, decide on the best width and depth of the weight hole.  A nice spreadsheet to use for this can be see in PDF form here: http://wiki.bowlingchat.net/wiki/index.php/Image:Weightremoval.pdf from Jayhawk, on Morich''''s Wiki webpage.  For Symmetrical balls, the weight hole is placed ont he original mark you made all the way back Step 1, the "Assumed MB" and for Asymmetric balls, it''''s in the same place, but you actually have a MB mark, that makes it fool proof.

Step 10: The final product should look something like this!
http://www.brunsnick.com/images/ricolayout.jpg

Bibliography:
Rico Wiki: http://wiki.bowlingchat.net/wiki/index.php?title=Rico&printable=yes
BrunsNick: http://brunsnick.com/rico_ball_layout.html
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Edited on 5/12/2010 2:28 PM