Revision online store on the engine Fast-Sales

There is an online store mirserebra925.ru run is the latest Fast-Sales. Need to finish some module, change the appearance, improve the layout etc.
Working principle:
All work is performed on your server. I drop database and files. You install on the server.I describe the requirements specification. You estimate the cost, and how much time will take work. I'm doing a prepayment. Do on the server, I
check (if it works) pay the remaining amount, you send me
fixed (modified files).
Edit and finish need a lot. So a lot of the time.
Only interested in private programmers.
The web Studio and the like (NOT INTERESTING)
Work directly, without intermediaries (from you bag number or card)
It is desirable to write directly on mail planetasilver@bk.ru