At early of this year, bluehost.com was starting to offering both php version 4 and php version 5, at your choice. By default, the sign up will be locating you at the php4 server box. As most the script in market is supporting this version 4 script. However, if you need to have php5 on bluehost server, then you need to contact bluehost support through email or through live chat or give them a phone call.
As usual, bluehost support will need to verify your account, and after that will migrate your account to the server with php5. As this involve server and IP changed, your website will be down for 1-4 hours. And best news is that there is no extra charge. Bluehost will migrate your site to php 5 free of charge. 
I just checked my bluehost cpanel account, and i am still at the php version 4.4.6 . That is a php 4 apache server running version 1.3.37. And at this point, i not having script that require php5 to run, so there is no future planning to move over to version 5. If you need it, then request for the move.
The next posting will try to cover some bluehost fantastico and script installation, since we are already at the php and script installation thing.
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