recently had this exact problem,

you don't need the OOB port so just set its IP and gateway to something you'll never need (or just leave it un-configured completely make sure it's unplugged/disabled)

what you did with the VLAN is correct you just need to set the gateway:

console>enable

console#configure

console(config)#interface vlan 1

console(config-if)#ip address 192.168.0.250 255.255.255.0

console(config-if)# exit

console(config)#ip default-gateway 192.168.0.1

by setting the default gateway you should now be able to administer your switch from other subnets

you might have already worked this out, but good to leave it here for others.