Dear Sir,
Thanks for posting the project. I Upgraded minimum 5 Magento shop to 1.9.1.1 from lower version for my client. The lowest version upgraded from 1.6 to 1.9.1.1.
My Plan:
1. I will create a dev environment with all current data and files (with separate DB) of 1.7
2. I will Perform Upgrade process.
3. After success, i will just transfer the files to your main domain.
What I need to know::
1. If you have installed any external modules. And they are compatible with magento 1.9.1.1
2. If any of your core magento files modified or not in ver. 1.7
What you have to provide ::
1. Full Server Cpanel access
2. Full Magento Admin access.
You can select me after complete the job. I am interested to work in your project :)
All order not transferred means, the previous developer didn't worked on LIVE data in dev environment. :)
Waiting for your kind reply,
-Rudraraj