Hi,
yep - if you obtain the downloader it'll be either as a program on the CD as part of the Metastock disk, or (as many will have obtained it) a download which will be a single exe file. You could copy the downloaded exe file onto a CD, I suspect it'd be too big for a floppy, it's a long time since I installed it so I can't tell you the filesize but I'd guess around 2Mb.
From then on it should be easy to copy from CD whenever required, once you've copied it to the target PC double click the exe to run and install it I'd expect... I can't be exact in instructions as I did this stuff a couple of years back, but that's the way it used to work anyhow and I doubt it has changed.
Dave