[therealcedz]

I remember when my calculator accidentally erased all my programs. One way you can avoid this is archiving the programs. Grouping them will archive them, preventing them from being erased. 2nd -> mem -> group -> create new group. You have to choose at least two programs for you to group them. after choosing two programs, you could test it out. Group 2 dud programs, erase each of them, and go to 2nd -> mem - > group -> ungroup -> and choose the group that contains the program. Now whenever your ram gets erased, you could ungroup the programs to regain them.

A way to make a custom menu is to have a next/ previous button. so something like this:

Lbl 7
menu("equations", "f=ma", 1,"vf = vi + at", 2, " d = .5at^2 + vot", 3, "next", 4)

Lbl 4
menu("equations pg2", "vf^2 = vi^2+ 2ad", 5,"t = rxf", 6, " back", 7, "next", 8)

Lbl 8
menu("equations pg3", "blah", 9,"blah", a, " back", 4, "next", b)

Lbl b
menu(....)

//rest of program goes here

Even though you loose two spots for equations on each page, you can create an infinite number of spaces