Acrobat / FrameMaker conflicts during install

[poshedly at bellsouth.net]

My client company just went ahead and bit the bullet and forked out around $800 or so for FrameMaker 8.0. (Does this mean that Frame 9.0 will be $900, Frame 10.0 will be $1,000, etc, etc?). We also bought Acrobat Professional 8.0 as well.
 
I want to do a “clean” installation but before I do, I have some concerns because of what is on the terminal that I “inherited” (with Windows XP Office and the service packs, etc.).
 
It already has on it the folders (and their subfolders) – but NOT the executable application files – for Acrobat 6.0 and 7.0.
 
Without the executable files, I can’t do an uninstall via Control Panel. So apparently, my only option is to simply do what you’re NOT supposed to do – just delete the Acrobat 6.0 and 7.0 folders. Ooh, but that grates on me because I fear that bits and pieces of either or both Acrobats are already strewn hither and thither throughout the Windows XP operating system and will cause problems later on down the line. Or not.
 
(Remember the good old days, when a program was all in one folder, I mean “directory”? Hah! We’ll never see THAT stuff again.)
 
I already found out the hard way how nice and courteous (NOT!!) one Acrobat program is to another after first installing FrameMaker 8.0 (along with its PDFMaker feature) and then NOT being able to install Acrobat 8.0 afterwards. (I kept getting a message after the Acrobat 8.0 setup procedure was well into progress that “Setup has detected that you already have a more functional product installed. Setup will now terminate.”)
 
So I uninstalled FM8.0 and its plug-ins and the Acrobat 8.0 install moved along much further than before (I had to cancel it, however, until my IT guy gets in here with the serial number).
 
So with FM8.0 and Acrobat8.0 currently off the drive, what to do about the previously installed Acrobat 6.0 and 7.0 folders in light of their missing executable application files.
 
Just delete them and proceed with the Acrobat 8.0 and then FM 8.0 installations?
 
BTW, the Adobe docs really play up the purchased support plans (even for “defective products”), leading me to believe that free telephone support for initial setup is no more. But somewhere, I did find that there apparently is 90-day free phone support for initial setup problems.
 
Am I correct on this?
 
-- Ken in Atlanta