Links

No I would say those orange cubes are not sufficient.
Here's some links on gutloading:
http://chameleonnews.com/?page=article&id=101
http://www.screameleons.com/site/3602/default.aspx
http://www.chameleonforums.com/gutloading-tips-new-owner-15262/
http://www.chameleonforums.com/gutloading-recipes-1803/

Use the supplement with D3 once a week. Use a calcium supplement withOUT D3 dusted lightly on all crickets. Whether or not you use it on other insects really depends on the bug and what you feed the bug.
Use a vitamin supplement a couple times a month. This is in concert with a good gutload.

Here's a bunch of links regarding supplementation. I know it seems like a lot, but give yourself an hour to read these over and you'll learn quite a bit!

http://chameleonnews.com/?page=article&id=96
http://chameleonnews.com/?page=article&id=102
http://chameleonnews.com/?page=article&id=93
http://www.chameleonforums.com/food-thought-12472/index2.html
http://web.archive.org/web/20060502...rnals.com/vet/index.php?show=5.Vitamin.A.html
http://www.chameleonforums.com/good-vita-b-gutload-20094/
http://www.chameleonforums.com/supplement-schedule-14739/
http://www.chameleonforums.com/supplimenting-schedule-issue-13515/
http://www.chameleonforums.com/my-supplementation-schedule-ok-16028/
http://www.chameleonforums.com/supplementation-mbd-1-a-2451/ http://www.chameleonforums.com/feeding-d3-supplements-15789/
http://www.chameleonforums.com/calcium-d3-without-15065/
http://www.chameleonforums.com/vitamin-d3-10858/
http://www.chameleonforums.com/mixing-cal-w-d3-15999/
http://www.animalarkshelter.org/cin/
http://www.chameleonsonline.com/feeding.php Thank you Sandracham