Trevor,
Only some of it can be done online, you still need to be incountry and go down to the local DTI office, finding one can be difficult, as you have to go to the correct one for your area, the one in Makati covers Metro Manila but if you are in say Rizal, one province over from Metro, it can be damned hard to find the office, I speak from experience.
You will need your Philippine ID\'s, your Barangay Cleareance, Probably a Postal ID, maybe a passport, 2 of 2x2 Photos, some money, and then some more money if the name you want is not allowed, but it can be bought for the right exchange. Nudge, Nudge, Wink, Wink, say no more.
So if you are out of the country, it will be difficult to open a business in country, lawyers cannot help in this respect as it is the business owner who has to do the work, unless the attorney is an employee of the business. Its not like the US, where I can setup a US business without setting foot in the country.
Wayne