You may need to do some checking at the school where you are taking your pre-reqs. Chem I/II are generally pre-reqs for Ochem. Some schools do allow you take them simultaneously, though. Be sure you check with some people about how doable this is.
Assuming that it is possible to take both at the same time fall '07 and spring '08, you could take the MCAT in June '08, apply June '08 for admission Fall '09. But, if you find out you can’t take both chemistry classes at the same time, you may have to add another year to that. So, the more likely scenario is gen chem this coming year, organich in 08-09, apply '09 for entering class of '10. Another possibility would be to take gen chem this summer although you will want to do some serious checking into how intense it is. It can be done. Some people do it with considerable success, others find it ended up being more than they can handle. I don’t know what your work situation is, but it is virtually impossible to work while taking an intense summer science class.
You may also want to check with some schools you plan to apply to and ask about the age of your physics. Some schools have hard and fast rules about how old the pre-reqs may be, and your physics will be 8 years old at a minimum by the time you apply. I suspect that most schools will let the physics slide as long as the rest of your pre-reqs are current and your MCAT is decent, but you should check with a few.