Sooo anyways this is how I got SoaSE 1.05 working with Crossover Games 7.1.1 under Leopard....
SoaSE's Installer doesn't work correctly under Crossover Games. When you attempt to install from DVD the auto launcher is opened and just displays as a white screen. You can bypass this by copying all files to your desktop into a folder from the DVD, then delete all of the auto run and launcher files. With that done you can now use the install from folder option in CG to launch the installer.
This leads you to a second problem, while the directory structure is created and other post-install tasks are completed correctly, no files are actually transferred. To get around this problem I simple installed and patched SoaSE in a copy of Parallels Desktop 4, then transferred the Sins of a Solar Empire directory from my Parallels install into the corresponding Crossover directory.
Next you need to bypass the launcher for SoaSE as that will cause problems too. Go to Programs -> Run Command in crossover switch the bottle to what ever you installed SoaSE in (for me I called it SINS) and select "Browse..." Now navigate to Program Files -> Stardock Games -> Sins of a Solar Empire. Select Sins of a Solar Empire.exe and click the open button. Now it fill fill in the command line for you and simply click "Save Command to Programs Menu". Now you have a launcher that works from the crossover games menu!
Upon launch you will notice that some of the fonts are mis-sized. This can be fixed with the patched fonts in this file: www.honorguardonline.com/sins/sinsfontfix.tar.gz
Just copy and replace the files in your Fonts directory in the SoaSE directory.
From my experimentation with Cider and Crossover, don't enable Bloom Effects or change your quality settings as this can somehow result in stability issues. I know, I have a 8 core Mac Pro with an 8800 GT in it and I miss the prettiness. At least now I can launch a game of SoaSE any time I want without switching OSs and crashes are rare.
If you want to play a mod, 7 deadly sins, then this is how you can do so understanding this can harm stability.
Click "Manage Bottles" and select your SoaSE bottle. Click the advanced tab and "Open C: Drive in Finder". The save game, mod, etc directory is at: windows->profiles->crossover->Local Settings->Application Data->Ironclad Games->Sins of a Solar Empire
So just drop any Mods into the "Mods" directory.