personally I would go the easy way: use an IP address from10.122.244.* scope and assign it to another device/server and start another class like 10.0.0.*
You do not mention what your subnet mask is. It looks like you may be using /24 or 255.255.255.0. You will not be able to create additional addresses in the range you specify. You will need to create a new range of addresses… and maybe as Alessandro suggests, widen the range to /16 or 255.255.0.0 or /8 if you have that ability at your site. A superscope does not gain much as all the addresses in one scope will have to be distributed before the next scope begins to be put into use. So, you might as well use individual scopes.