Hi Bamboo. I never trusted any of these installer utilities myself. I certainly wouldn't spend out $40 on one without being able to check it out first.

My best advice would be to learn to install stuff properly. Then you will know what to look for if anything goes wrong. Don't go on a download spree & install everything at once. Do each one individually & check it out in the sim every time. Then you will know which addon caused the problem if you have one.
Installing aircraft & panels is perfectly straightforward once you understand the basic principles. The Help section here at SimV has all the tutorials you should need. You can also visit my Lair. Post here on the forum if there's anything you don't understand.
Here's a couple of tutes to go on with.
http://www.simviation.com/acinstall.htmhttp://www.simviation.com/paninstall.htmPS. 3 more tips.
Always take a backup copy of files you intend modifying.
NEVER unzip files direct to the sim.
When installing gauges DON'T overwrite existing files/folders if prompted.