When you do a soft reset of your PalmPilot, all of these HackMaster controlled Hacks will be disabled. Another nice feature of HackMaster is that when a reset is performed, it pops up a box asking if you'd like to have all of your previously enabled Hacks turned back on.

Word of caution
Installing Hacks is as simple as installing any other PalmPilot application. However, due to the very nature of what a Hack is, if you are installing an update to a currently installed Hack, you need to remember to go to HackMaster and disable (un-check the checkbox next to it) that hack before installing the update. This also applies to deleting a Hack (via the Memory App) without first disabling it. Failure to do this will sometime produce some un-wanted results (most of the time the system will lock and require a reset the first time you try to access that Hack). Not to worry, if you forget to do this, then a simple soft reset will take care of the problem in most cases.

Hacks available
There's really not a good list compiled anywhere of all the available hacks and what they do. The closest you can come is to go to one of the software sites, and search for HackMaster (most have HackMaster as its own category). Take note that a good number of these Hacks, as well as HackMaster itself, are shareware. Please register if you intend on using them beyond each application's specified trial period/conditions.

My top Hacks
I don't see anyone installing ALL of the available Hacks. But, there is a handful that I consider MUST HAVE hacks. These hacks' usefulness range from improving on built-in system function to making the PalmPilot's already easy to use interface that much easier. Here are the hacks that I consider "MUST HAVE":

SwitchHack
SwitchHack allows you to switch from the current application, to the last one that you were executing. Doesn't sound useful? Well, suppose you're in a third party application like J-File working on your video tape collection DB, and suddenly you need to call your buddy to find out if he knows the rating of Gone With the Wind. Without SwitchHack, you'd press the Address List button, and then slog your way back through the applications picker until you got back to J-File. With SwitchHack, once you give your pal a ring, you would do the stroke that SwitchHack uses, and you're right back in J-File.

Be aware that SwitchHack works best with applications that save their current state when they are exited. SwitchHack also has another feature: it keeps track of the last ten applications you've run, and you can quickly display a list of them. Selecting an application from this list will run that application. In effect, if you have ten applications that you use most of the time, you might never find yourself going to an applications launcher again!

ClipHack
For some reason, the PalmPilot has about a 1K limit on the size of text you can cut from one application and paste into another. Simply stated, ClipHack removes this limitation and allows you to clip text up to 32K in size. A nice feature of ClipHack is that when you use it to clip more than the standard allowed 1K, it displays a box showing you the number of words and characters in the selected text (tap and hold that box to keep in on the screen, otherwise it will disappear after about a second). While most folks would only be using clips of up to 4K (the limit of Memo Pad and attached memos), there are some applications that allow larger memo sizes (for instance, some of the outlining applications). I never did understand why you could have 4K memos and not be able to cut/paste the entire memo, but since I've installed ClipHack, I don't worry about this anymore.