I see 2 possible issues here.
1.By default, the core's (LMCE's) internal ip should be 192.168.80.1.
And if you have really followed the instructions regarding networking in LMCE, you shouldn't even need the IP, you should simply have to use dcerouter://path/to/share, as LMCE provides its own internal DNS and name resolvers.
This is hard coded, and as a result so are all of its config files. samba.conf, /etc/exports, etc. This is why we HIGHLY RECOMMEND not changing these settings.
2.) Putting the above aside, perhaps you are a networking wizard (I sadly am not) and you knew that changing the internal ip address would change how the system shares media, and as it is a networked system, you went through and changed all the appropriate files so that now the 192.168.2.0 network is permissive to the shares. If this is the case, then all you should need to connect to the shares is the username and password you created on initial install, for example, before I changed my password, my username was/is : seth and my password was : seth
Those credentials are all you should need to connect to the shares served up from the core. Provided the network you are accessing the media on is set to be permissive in all the appropriate config files.
Hope that helps. Best of luck to you.