Not a CentOS specific question, but I'll try anyway. :)
I've decided I need a proper IP Management solution. In a perfect world I'd like something like QIP or NetID, but I have a feeling that's too much so ask, so I'll go for DHCP/DNS management. :)
There's alot of different opensource products out there, but I'd rather get recommendations than spend days configuring all of them just for evaluation. :)
Regards, Harald