"Needed? just do it anyhow."

Clearly this wouldn't suit Jan's application.

"I know, thus I used the word "risky" not "impossible""

In what way do you see it as risky?

"The IAP code is for programming (thus the 'P') using code for something it was not intended for is, at best, risky."

If I understand you correctly you think that the IAP routines are only intended to be used to replace the currently running program with another? There is no such restriction.