If you want to transfer your RRSP money from Questrade to ING, contact ING and ask them how to proceed. They will want your money, and will be willing to help with the process.
Rather than going to cash you can always go to couch potato as a strategy that should have higher growth than a GIC, but is not prone to speculation. By the way, "going to cash" in your RRSP doesn't mean withdrawing it, it means selling the stocks and leaving the lump of cash sitting there in the account. Or putting it into a money market fund or high interest savings account.