I need my current osCommerce store brought up to the latest stable release without breaking anything that already works. The shop has been running for years, so every product, customer record, order history, tax rule and shipping setting must move across intact. I’m flexible on the exact upgrade path as long as we end up fully patched, PHP-compatible and safe from the usual security exploits. Please plan for: • Migrating the full database and media assets • Re-creating or modernising the existing theme so the front-end looks familiar to returning customers • Testing all core functions—catalog browsing, checkout, email notifications and admin reports—on desktop and mobile • Advising on extension compatibility and replacing any outdated add-ons with current equivalents where necessary A brief outline of your proposed steps, the tools you like to use for staging and backups, and an estimated turnaround time will help me choose quickly.