Yes I believe not as HE would be buying the rights to use that IP on your behalf. Companies purchase batches of IPs and they're allowed to use these on the machines they administer so that's why I think not, though I may be wrong.
To use HTTPS and your SSL Cert you need to first get a dedicated IP. The company we use requires a price of $12 US/yr for one. Use Paypal to send it to admin@heliohost.org and when the payment is confirmed you'll have a dedicated IP to use with your secure transactions.
Here's a link to Johnny's softaculous menu http://johnny.heliohost.org:2082/frontend/x3/softaculous/index.live.php Step 5 looks to be upgrading from phpbb 2.0 versions to 3.0. Are you upgrading an old install or are you just installing a fresh copy?