[R] How to do log normal regression?

[Haibo Huang]

I want to fit a Log-Normal CDF function between two
variables, and estimate the parameters. Is there any
package/functions designed for this purpose? 

Basically, I have data for Y and X, and I suspect the
relationship between Y and X is Y = CDF Log-Normal
(X), and I want to run this regression to verify this
and estimate the parameters. Anyone has any thoughts?

Any input is valuable to me, so please do not hesitate
to share your thoughts. Thank you!

Ed.