If you don't have a hard disk, then there is no installation procedure. It might be wise to make backup copies of the floppy disks though.
If you have a hard disk and want to install PLPLOT on it I recommend creating a :plplot/lib directory on your harddisk and then copying the library there. The following commands will do the trick.
Be sure to substitute the name of your own hard disk for <#139#>HDDISK<#139#> in the above commands.verbatim1#