No, you don't have to use the generic spread tab.
I trade ICs and here's what i do:
Go to the spread trader dialog. Click on the "single" tab. Select "Iron Condor" for the strategy. Start entering the legs, long put first. As you fill them in, the available choices start narrowing down to make selecting the next leg easier. If you select NOV09 for instance, all the legs are narrowed to the same month. If the long and short puts are 2 strikes apart, the calls will be assumed to be 2 strikes apart too. It's not that bad and it's getting better.
Having used both TOS and IB, I do agree that TOS is the superior options trading platform. If IB added a risk graph capability (hint hint) they'd give TOS a run for their money.