o.k., i have processed now all the 6 steps one after the other. It is looking fine as far as I can see.
There was an issue with cookies. The cookie prefix in my phpbb3 installation is a differnt one the the one you are recommending in the ACP of RP. My is "phpbb3_kvnma", the in RP recommende one was differnt.
I have looked up mine in the ACP of phpbb3 in the "general" Tab at the lower left hand buttom "server configuration/Cookies"
So this accepts now my username and password on all parts of my site without logging in again.
I still have to test a little bit, whether everything is fine, but as far as I can see, it was a really easy walk to exchange vb3 with phpbb3 while staying integrated with RP.
Really Cool...
I will later on summarize all steps and correct my mistakes in the description above so that we have here a good manual for phpbb3 switcher to reduce the fear of switching
I am pretty sure that after this big
vb-announcemnet desaster, many vb3 users will consider to switch to either phpbb3 or to IPB (which is a really nice software and significant cheaper than vb4)
Did I say already
really cool?