How about trying this - if you feel more comfortable using html, then continue to do so..
Open one window and have it open on the Host/Skins or Admin/ Skins page - where ever you are saving files to.
Then have another window open with the skin file in it.
Open the html file directly where the skin is.. work on it, work on the xml file in situ -and then when you've saved it - drop the skin box down in the skins area, and downl the bottom of the page, you'll see - parse skin - click the *portable* radio button and reparse the skin..
Then click the other window where the skin is.. and preview it.
It's like working in ASCX mode, but, you're reparsing the html skin which means the skinning engine is doing it's job with the html file and modifying the ascx file for you instead.
I was thinking about how to skin a cat .. and there are lots of ways..
Give that at try - then you won't have to zip the skin all the time and you get your cake and eat it too.
Cheers
Nina Meiers