Yes, you're doing it the "right" way i have to say! A few more things that may come in handy:
- if you debrand using SEUS successfully, you don't need the youtube fix floating around because SE has included it in the latest firmwares R3EA*.
- AT&T's CV (Cingular Video) through MediaNet Portal still needs a fix to change Model from W760i to W760a. No idea about Rogers.
- I think you can upload WAP and MMS settings via some xml file. I have yet to figure out how. If you know how post back! :) I used SE's website here to send those settings OTA, and they worked fine.

I'm thinking if I can update WAP, MMS, wireless village, email settings, date/time format, camera shutter sound, key mappings, certificates, etc, through a couple of xml files. This would make future updates easier. I wonder if anyone has done this before.