Oh... I suppose this is an answer to my curiosity too
Yes, I know... it'd be sufficient I googled for a while but, as I said, mine was a question arose at the time I was writing...
---- EDIT ---- EDIT ---- EDIT ----
Ok, just tried...
New to this world and with just a little little little bit of knowledge about UNIX-Linux, maybe I did a mistake but:
copying the .apk in /data/app and resetting did the job instead using busybox didn't
As I can see having a look to busybox docs, the install command with no other parameters just copies the file so you can do the same with:
cp /sdcard/yourapp.apk /sd-ext/app
More... if I understood well, sd-ext is the application repository used if you enable apps2sd and if you have not (I don't, at present time, as I'm testing...) the method doesn't work...
Qtek 9100 (HTC Wizard)
MDA Vario III (HTC Kayser)