That really shouldn't be a problem. We expect to find multiple funded addresses per wallet.
You could try using the console in the CLAM client and importing the private keys one by one, although that isn't ideal since you'll potentially miss some funded "change" addresses:
Run the LTC client, go to the console, run "dumpprivkey ADDR" for a funded address. Copy the result.
Run the CLAM client, go to the console, run "importprivkey KEY import false" where KEY is the thing you copied in the previous step.
Repeat for each address. On the last one, write "true" instead of "false" to let it rescan the blockchain. That will take 5 or 10 minutes and will probably make the wallet appear to hang while it runs, but you'll see your 4.6 CLAMs start appearing pretty quickly.
updated client to .16
tested it now and it works importing privkey form litecoin works, like Dooglus said, with option import true on seems like client hangs but afetr 1 minutes you seen the coins appear and it is staking !