Starter with two strains for Czech Pils?

I am going to do a 12 gallon batch of an all grain Czech Pils, and I wanted to get a little more creative with it. I have heard that Urquell actually uses five strains, one of them being Wyeast Urquell 2001.

For this batch I am going to make a 4L starter and, according to Mr. Malty, use 4 smack packs. Can I use two different strains in that starter to get something more complex than the one strain would give? Say, the Urquell and the Wyeast Bohemian Lager 2124?

Thanks

Is this a recipe you've made before? I think you should definitely mix yeast strains.

The best way would be to ferment half the batch with just one strain, and the other half with the mix, to get a better idea of what each is doing.