The easiest way to share sims on multiple computers is to use the free Network viewer, but you may have already installed the regular Platinum version on computers or otherwise don't want to install the Network version. This article talks about changing the main sim folder (where sims are stored) directly.
The idea is to allow creation/editing of sims on one user account, and play the sims on other computers.
When you open SimsUshare, by default, the sims are stored (or played) from a private folder, namely My Documents\SimsUshare. So that’s what you see your sims but other computers or users would not see your sims. You need to copy sims to other computers, or, preferably, point the program to share a folder of sims you make.
There are two ways to do this. First, however, go to My Documents\SimsUshare and copy the SimsUshare folder to your shared network folder, and rename the SimsUshare folder to SharedSims (so I will refer to it going on as “N:\SharedSims”). If you look into “N:\SharedSims”, you should now have two items, a folder called sims and file called catalog.xml. Of course all the computers need to have access to that folder to start.
If you want to install the program into a shared folder for people to use to view sims, here is a way to use the free Network viewer: http://simsushare.com/need-help/#toggle-id-12
Of course please call or email us if you need more help with this.