Welcome to the forum and to glider parenthood.
Hopefully I will not add to your confusion and can help you locate the information you need to make a choice of diets for your glider.
There are a number of widely used glider feeding plans that all provide a recipe for a nectar-like staple that provides your gliders the protein, vitamins and calcium they need. This nectar-like staple is fed with fresh or frozen fruits and vegetables to complete the dinner fed to your gliders each night. A few pellets can be offered as something crunch for gliders to munch on but pellets alone will not keep your glider healthy long term.
There is no formal approval process for glider diets - we rely on the test of time meaning we have much more confidence in staple recipes and ingredients that have maintained healthy gliders for many years.
There are a number of widely used feeding plans other than HPW you may also want to consider. I have links on my web page to help you locate the information on other options. My own GliderKids Feeding Plan is one of those option.
http://www.gliderkids-diet.com/Staple-Recipes.html
There is much confusion over the "HPW" diets because there are so MANY of them - and not all are nutritionally equal. Not all have met the test of time with MANY owners using them for a number of years to be able to observe the health of many gliders over time.
I will try to sort out the various HPW diets for you.
Original HPW - this diet was developed by Peggy Brewer about 10 years ago. Its main ingredient is
Wombaroo High Protein Supplement made in Australia specifically for sugar gliders and similar marsupials. It is imported to the US and sold by a few vendors in this community. The best source is the Pampered Glider
http://www.thepamperedglider.com/supplements.htm
Exotic Nutrition sells many products that carry the HPW 'name' but none of their products actually contain Wombaroo High Protein Supplement. Their
Zoo Pro High Protein Supplement is undoubtedly very similar nutritionally and is use to make "HPW" using the same recipe as Original HPW. This product has only been sold for about 2 or 3 years but I have not seen any discussions about health issues for gliders fed the 'HPW' made with this product.
About 4 years ago Peggy Brewer stopped selling Wombaroo High Protein Supplement and paid to develop her own line of products under the HPW name which includes
HPW Plus which like exotic nutrition's Zoo Pro High Protein Supplement is prepared using the exact same recipe as Original HPW.
At the same time she introduced a product called
HPW Complete which contains powdered Egg and Powdered Honey. This product requires water only to make the staple and can be made in small batches and refrigerated for up to 5 days if you prefer not to make a large batch and freeze it in ice cube tray.
Exotic Nutrition followed with
Instant HPW - again containing powdered egg and powdered honey and made with water only. This product's mixing directions and ingredients listed on the package seems to make a staple that is higher in protein (possibly too high) that the other versions of HPW.
Just this past year (2014) Exotic Nutrition has begun selling a premixed line of HPW Products in jars. This is so new I would not yet recommend trying it. It has not met the test of time and if not used promptly after opening the jar or if not kept cool enough would be more prone to spoiling than the freshly made recipes that are stored frozen until it is served each night.
NOW - just to keep your head spinning - Peggy has recently renamed and trademarked her products under a new name - to avoid the confusion between all the HPW diets out there (which also includes many personal web pages with variations of the original recipe posted)
HPW Plus is now sold as Critter Love Plus. HPW Complete is now sold as Critter Love Complete and she has added two additional versions Critter Love Breeder's Formula and a brand new (announced 2 weeks ago) Critter Love Lo-Cal which contains no honey and is also an add water only product. The Critter Love products can be found HERE
http://www.critterlovedietcenter.com/
If you would like to feed your gliders HPW - I recommend the Original HPW made with Wombaroo High Protein Supplement because it has the longest history of use.
Some owners have expressed concern over the use of menadione - a synthetic vitamin K supplement used in pet foods which as been banned for use in Humans but is the ONLY vitamin K supplement permitted for use in pet foods made in the USA.
Menadione is banned for use in pet foods also in Australia so Wombaroo High Protein Supplement contains a human grade supplement that NONE of the other products which are all made in the US contain.
If that is not a concern for you and you want to use one of the ADD WATER ONLY versions - keep in mind that these contain pasteurized RAW eggs and Powdered Honey that contains chemical additives to prevent caking during storage. I do not feel gliders need these additives and I would prefer to cook the eggs I use to feed my gliders.
Keep in mind also that HPW diets require close attention to feeding some higher calcium fruits and vegetables each week and limiting very high phosphorus foods like corn and peas to only a few times a week to keep the overall feedings higher in calcium than phosphorus.