How do I resize my Lion startup partition?

Hi there,
I just upgraded from Snow Leopard to Lion by partitioning my drive and clean installing Lion on a blank partition. I copied most of my documents from the Snow Leopard partition onto an external hard drive to free up some space for the Lion partition. Then I made a blank partition and installed Lion on that partition, and used Migration Assistant to pull in my Applications, Settings, etc. Now I have a fully functional version of Lion, with most of my files on the Lion partition. However, the partition is virtually full, and I still have files on my external hard drive I need to swap onto the Lion partition. So naturally, I need to enlarge the Lion partition. The problem is that it's also my startup disk and the only partition with an operating system on it.
I deleted my Snow Leopard partition because frankly I'm satisfied with Lion and I don't need the old one. Yet my Lion partition cannot expand to fill that empty partition. I can leave my former Snow Leopard partition as unformatted Free Space (which is of course not writeable) or format it with HFS+ and use it as a regular storage partition. I would like to have just the one partition for my entire disk, though. I want all my files on the same partition, on the same drive, so my goal is to expand the Lion partition to occupy the entire drive. My understanding is that I can resize the startup volume, but I can't move it. Since my startup volume is #2 and the former Snow Leopard partition is #1, I would need to swap their order and delete the Snow Leopard partition to expand the Lion partition.
(The diskutil command in Terminal lists my blank/useless partition as disk0s2 and the Lion partition as disk0s3, so my current startup disk is definitely sequentially after my old one.)
The solutions I can think of:
-Use the Snow Leopard installation disk to run Disk Utility and resize the Lion partition while it is not the boot disk (but Disk Utility doesn't move partitions)
-Use iPartition to move the Lion partition and expand it to fill the entire disk (but iPartition can't resize the live disk - I would need to make a bootable DVD to run it)
-Use the former Snow Leopard partition for storage - say, a photograph archive or my iTunes library (acceptable but not ideal)
I would really appreciate any suggestions or information. Thank you!

Unfortunately, you cannot enlarge a Lion OSX partition with Disk Utility now (perhaps after an update), so even if you copy it to the old SL partition, you won't be able to expand it afterwards.  Plus, the Recovery HD won't be copied.
You could "clone" your Lion partition, boot from the clone, reformat your internal HD, and re-clone back to it.  That will work, with one very large exception: the Recovery HD will not be cloned, so you'll be out of luck trying to do anything from it.  See Using the Recovery HD
You might be able to do the clone, reformat your internal HD, re-download the Lion Installer, install it on the internal, then use Setup Assistant to copy your stuff from the clone.  See Using Setup Assistant on Lion

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