As far as I know, there is no way, as I tried when I installed Sat during the summer. Dish has had many of these channels (not all) for over a month and is promising customers to keep up with Directv. In the past, they have had the channels sooner. They just added this week 8 pay-per-view hd channels, and their DVR is free, with a new plus-you can hook up an external hard drive (750gb holds about 125 hd movies) to extend dvr space. Just some info for you. Plus Dish already has all of the Voom channels as well, with greats like Monsters HD (horror and sci fi movies from Texas Chainsaw to Sinbad classics to the 30's Frankenstein) and Film Festival HD, which shows movies like Exodus.
No I am not a Dish resprsentative, but am very happy with them, and believe what they say about keeping up. They are not going to sit by and let Directv take over their HD lead. They are now re-arranging channels and deleting some crap for more room and have another sat they can use as well. Might want to read some of the forums before you make the decision. The mistake Dish is making is not advertising like Directv is, about their HD line-up. Something to think about anyway.