[R] How is "R CMD INSTALL --help" executed?

[morphwj at comcast.net]

Installation Configuration: Windows XP version 5.1 with Service Pack 2, Rtools (bin, MnGW, perl), and HTML HelpWorkshop,  and R-2.5.1.
Files Located: Scrips build, check and install are in C:\Program Files\R\R-2.5.1\bin.
Path Verified:  Windows path begins with  "c:\Rtools\bin; c:\Rtools\perl\bin; c:\Rtools\MinGW\bin;" (without quotes).
Documents Being Read: Writing R Extensions, and "The Windows toolset" in R-admin.

The Problem: The example in R Help package.skeleton was created and the produced files were edited.  In what window, at what prompt, or in what other way is R CMD INSTALL --help  entered or executed?  What additional setup is required for the system to recognize this command?
Found example "R CMD build --force --binary --auto-zip %1 pkgname" in search.R-project.org .  What must be done so system can find package pkgname?

Bill Morphet
ATK Launch Systems, RSRM Postfire Evaluation Eng
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