I do the following:
I choose package BPL file, package appears checked on 'Design packages' list.
Now I can place additional compontets on forms and compile project with them.
I save and close my project, reopen it and then when I open form with additional components Builder shouts that they could not be found and indeed: when I look on package list again this package is unchecked. When I try to ckeck it, Builder complains about some file that cannot be found... and I have to [Add] this package again!
What am I doing wrong?