there's 3 problems with having the regsvr32 commands running on logon. 1, the logon script itself requires the dll's (this could be overcome by having 2 consecutive scripts I suppose). 2, the users do not have permission to register dll's, security feature to protect the system. 3, this would lengthen the logon process.
I've played around with the dameware nt utilities as suggested by psychpt earlier but I still have to logon manually to each server in the farm using the RCmd Console which is what I was hoping to avoid in the first place.
I'm wondering if it might be best to write a service to register the dll's when they are updated.