Strangely again the OSCommerce v2.3.4.1 CE I'd installed from a zip file and during the installation it had indicated the old version of php was fine, showing a thumbs up by the PHP version during the installation screens. For some reason doesn't pick up on this in the install screens correctly!
Sorry I had missed this on your QTPro version Raiwa. So all good now and thanks for the help.
Raiwa - just a small note on your QTPro 2.3.4.1. CE Frozen installation documentation (word file). Install point 5:
5. [mandatory] In Admin =>Product Attributes => Header Tags install and configure the module "QT Pro Stock Check".
needs to say in Admin / Modules / Header Tags - install QT Pro Stock Check
i.e. not in Product Attributes. A typo I think but it may be worth changing this for the next update.