The other solution is to install a sudo (Super User Do) third party extension to temp raise rights on a given program so it can do it's work and not have to let everything that auto runs be admin too.
This program may have issues RUNNING as a limited user in the default configuration because it uses a settings.ini IN it's programs folder. This means for the running program to modify the settings.ini file to save pref's the program will need to be running as an Administrator group member.
A solution to that issue is to install it somewhere that ALL users have WRITE access to... consider changing the install folder to a sub-folder off the Shared Documents tree.
ie \Documents and Settings\All Users\Documents\Program Files\FolderMarkerPro
When istalling it does write to the HKLM registry tree which negates installing it as a limited user, but it stores th registration key in the HKCU registry tree so you are only registered/activated for the user account you install it on! I wish these developers would make their minds up! Stick to HKLM or HKCU, if you use HKLM then activate it for all users, one for all... If you insist on a per-user activation then drop any All User settings that pollute other users accounts with registry information that is of no use to them!
Also put the Settings.ini in the per-user Application Data\FolderMarkerPro folder and lets get with the times of a multi-user environment. That has been the required NORM since windows2000!
As this program needs Write access rights to set the desktop.ini files values to customise the folder icon it will be restricted to just the shared or users own folders in their documents and settings tree and anywhere else thy have been given write access to.
This program is not Vista compatible because it uses a different method of folder icon customisation than Vista so even though it can be madeto put its control files and ico files where it wants to... Vista doesn't use them. Also Vista can't see the contents of the included .icl files either.