A couple of recommendations:
1. Testor's wood glue is not a good choice, IMHO. I use yellow carpenter's glue (Titebond, etc.), or super glue. Both are great for balsa.
2. There are a lot of resources available for "stick and tissue" builders on the web. A couple of good ones:
www.smallflyingarts.com
The Yahoo group "FFcookup" Moderated by John Ernst, this is a very friendly bunch.
3. Painting the pieces with diluted white glue is an option for applying the tissue to the frames, but does nothing for you during construction of the frames themselves. There are a number of techniques used to cover models with tissue, from the traditional dope to glue sticks and spray Krylon clear. Covering techniques are discussed in both forums mentioned above.
-Bill (Who currently has a DPC models 16" span Sopwith Triplane framed up and almost ready for covering.)