These OS's contain every bar that would be downloaded by BlackBerry Desktop Manager in a zip folder.
U can update os using cfp or you need those firmware to Jailbreak your PlayBook.
OS1 Downloads
1.0.1.1710
1.0.3.1868
1.0.5.2304
1.0.6.2390
1.0.7.2670
1.0.7.2942
1.0.8.4985
1.0.8.6067
OS2 Beta Downloads
2.0.0.3778
2.0.0.3894
2.0.0.4869
2.0.0.6149
2.0.0.7111
OS2 Official
2.0.0.7971
Edit : Don't update 7971 then you are unable to JB or root. you lost it
U can update os using cfp or you need those firmware to Jailbreak your PlayBook.
OS1 Downloads
1.0.1.1710
1.0.3.1868
1.0.5.2304
1.0.6.2390
1.0.7.2670
1.0.7.2942
1.0.8.4985
1.0.8.6067
OS2 Beta Downloads
2.0.0.3778
2.0.0.3894
2.0.0.4869
2.0.0.6149
2.0.0.7111
OS2 Official
2.0.0.7971
Edit : Don't update 7971 then you are unable to JB or root. you lost it