Well that's what I get for just reading...
>However, when this software is not installed, these drivers are not available.
and not following the link before opening my mouth err..fingers

Well in that case. Then take a snapshot of your system and I mean know which dll's you have and what versions. Do the install and see what changes (do a backup of reg while your at it.). Then compare what has changed. Next you will need to do some snooping on your system to see what is called. After that you will need to make a manifest for your exe... see... http://mmm4vb6.atom5.com/mmm-next-generation-1166.html or to delve into this black art (authors quote) ...

When Windows XP was released it contained a new feature meant to amplify upon the use of ".local" files for DLL Redirection in Windows 2000. The kinds of terminology you'll want to look up include side-by-side (SxS) isolation and Registration-Free COM.
Good Luck