Right click on 688I_HK.exe and select Properties.
On the window appearing (i am not sure if it is the same in your window 7), there should be a tab named "Version"
There, ignore the "file version 1.0.0.0", Sonalyst did not updated the info there, but you should see a panel named "Other version information", in the list click on "Product Version".
If your 688 is already patched to the latest version, you should see " 1.07 ", so no need to patch as the "realism patch" is already installed on your game.
If you have an inferior version to 1.07, you can see what are the changes coming with the latest version here to decide if you want to patch or not :
http://www.sonalystscombatsims.com/g...107_README.txt
The 1.07 download patch can be found there :
http://www.sonalystscombatsims.com/g...s_content.html
The 1.07 patch is just a new version of 688I_HK.exe , so you can just backup your current one and use the 1.07 version to see if it works.
(on XP i had a need to download the updated renderware DLL listed under the 1.07 patch on Sonalyst website, but on Window 7 you may have no need or them, unless they are already installed on the version you have)