Nanook, you're probably right that naked call writing is not allowed in an IRA account. However, there is an easy and cheap way to get around this.
Simply throw your broker a bone and purchase a cheap (a dime or so) Out of the Money Call, thus creating a credit spread. More and more brokers are waiving the base commission charge for the second leg. For example, Schwab's charge is a base of $9.95, plus 75 cents per contract. So, if you do this type of credit spread with 2 contracts in each leg, the commission for the whole enchilada would be $12.95.
Thus, purchasing 2 OTM Calls for 10 cents would cost $20 for the option and an extra $1.50 commission, or $21.50 total.
Just a thought. Hope this helps.
Bob