If you are using AVIA (or Video Essentials, which is very similar), there are test tones included that serve the same purpose as the 1050's built-in test tones. You would simply use those test tones to do your calibration instead of the 1050's tones. Using AVIA or VE may be easier, because (at least with VE, which is what I have) they stay on one test tone for longer, allowing you to adjust that speaker more carefully before moving on to the next speaker's tone. This is most true if you are using an SPL meter.

One potential problem with using AVIA or Video Essentials is the center surround speaker (if you have one). Because neither discs were created for 6.1/7.1 material, if you have SURR 6.1 on while using AVIA, you may find that the test tone sent to the right surround will be split between the right surround and the center surround by the 6.1 decoding. This will throw off your calibration (you will set the right surround too quiet). It is best to use AVIA with the 1050 in 5.1 mode, and then use the 1050's test tones afterward to set the center surround.

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Gonk