reseting the site to which a client is assigned

[gfunk123]

I have a primary and secondary site across 2 subnets on the same domain.

The subnets are 172.19.8.0 255.255.254.0
172.19.10.0 255.255.254.0

I specified the following boundaries on the primary site (LHW)

172.19.8.0
172.19.9.0
172.19.10.0
172.19.11.0

and these on the secondary (FHC)

172.19.10.0
172.19.11.0

Subsequently I have a crossover and a lot of PCs have been assigned to both sites. I have since removed the 2 extra subnets from the primary and now wish everything on the .10 and .11 subnets to be assigned only to the secondary (FHC)..My question is this, How do I reset the assignment of a client. can I just delete the object from the all systems collection and get it rediscovered or will my removal of the boundaries from the primary site be enough.

Any help on this would be greatly appreciated

Gary