driveimage xml and FDISR both using VSS, conflict?

I was wondering if I should not use drive image xml as it uses vss as it's primary way of imaging. Since shadow protect uses VSS and FDISR uses VSS and peter switched to using RSS would it be better to switch making my snapshots with RSS instead to avoid any problems or was it something specific and not just a conflict with 2 programs in general trying to use VSS at different times?

 

In more general terms then, if two programs need to use VSS at different times such as the combo I was talking about (FDISR and driveimage XML) I don't know of any conflicts unless there is an FDISR problem with any OTHER program trying to use VSS if that is the default imaging system too. Was it something specific with shadow protect or is this a general conflict because only one program is to use VSS ?