no you HAVE to install them in new seperate folders! :)

make the folder
copy/save the install file there
(plus the webpage, info, pics if you wish)
then install the item to THIS new folder

so, mike4, you get say
"Mike 4's fantasy armour"

make new folder inside your new Psoer mike 4 directory
C:poser Mike4mike 4 fantasy armour
save

if it's a DAZ installer, install to
c:Poser Mike 4
because the installer makes, or adds into, a RUNTIME folder in the Poser Mike 4
folder.
you understand? :)
DAZ installers create a "runtime" folder in EVERY folder you use

if it' s a.zip file, copy the zip file up into the main
Poser Mike 4
directory
unzip there, it will unzip automaticlaly into "Runtime" directory.
All well made Poser zip files will unzip to a Runtime folder. but this means unzipping from the main folder by copying up into it, or, by navigating an unzip menu

and in each Runtime folder DAZ installers or Zip files make, will be the texture, library and other folders, autumatically.
You see? :)

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