MT(5) installation problems once again

Hi there,

as with every major release (~2, 2.5, 3, 4, 5), I once again try to install MT and yet I haven't achieved it. Now I tried the MT 5.0b1 and did:

1). Upload the whole stuff
2). Give the *.cgi's the permissions plus to the "support" folder (didn't put mt-static outside mt, because that didn't work)
3). I did upload the mt-config.cgi with the correct database settings
4). I did NOT clean out the database which could contain fragments of old installation tries
5). I did create a "blog" folder at my ./ root level, as it didn't work else
6). I had to give not only 755 but 777 permissions to the /blog/ folder, so that it continues here:



This is how far I've come, as said, if I don't do step 5. + 6., it doesn't even go any further when clicking "Finish install". Yet what I mean which "continuing"/ "going further", is that it TRIES to load the "./mt/mt-upgrade.cgi" path/file. Still I only see a white screen (it shows "done", so seems to have finished loading). I have deactivated AdBlockPlus.

What is my problem here, what should I check for?

Thanks for your help in advance!

Kind regards