Okay I was not aware you already had the google apps. Yes you will not see the Google apps under "Downloaded" because they aren't. They are designed to be part of the core OS. "Downloaded" usually means apps downloaded by the Market.
Try the steps listed below(under 'TRY THIS FIRS'). If you still have problems accessing your Market, I recommend re-installing the google apps.
The way you install the google apps is the same way you install the ROM. Boot into the recovery. And use the menu options to install a zip package. I don't recall seeing the google apps in a RAR format, so that RAR file might not work in the Recovery app. What I would do is download the zip file from the link I provided and re-install the google apps.
What should happen then is when you boot your device you should get the setup wizard (in step 5 below) to associate your device to a google account. If that does not happen do it manually. This is done by following the steps below.
TRY THIS FIRST
Here are the steps.
YOU MUST HAVE INTERNET ACCESS FIRST
1) Go to your applications and find the "Settings" icon. It should look like a knob.
2) Select the "Accounts & Sync"
3) Select "Add account"
4) Select "Google"
5) Follow the setup wizard.
// You can create a new google account here or use an existing one.
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