Help me fit a 5'4" female

[Eden]

While you all have been posting here, I have been doing a bit of reading on the web and I feel pretty comfortable with a 48" seat tube (on a standard geometry), but I am still totally lost on cockpit length.

Unfortunately stand over is the probably the least important part of bike fit! I rode a 48cm standard straight top tube bike for years without knowing that it was really much too large for me. I could stand over it no problem! DON'T, DON'T focus on stand over as an indicator for bike fit. A few things to think about at the very least. When she sits on the bike her knee should be centered over the pedal when the crank arm is at 3oclock (on her right, 9oclock on her left) - saddle position and crank length will affect this and a plumb bob is a good way to check it (a homemade one is fine- put something heavy on a string). When she sits on the bike with her hands on the handlebars she should be able to have a comfortable bend in her elbows. Her upper body should not be stretched out with the elbows straight or locked.

this is a really nice bike fit web site with *pictures*
http://www.jimlangley.net/crank/bikefit.html