Have you figured out a way to save your own links to the source list? I was able to copy/paste my own link into the shop and use it, but I could find no way to permanently add it to the list.
Also, do you have to delete the site in order to have go to another? I can't figure out how to have more than one link on the bar at the same time. I keep deleting the site, than adding the next one from the source list.
Do you see all the way down in the lower left corner, there is a PLUS SIGN button? You need to be in Manage Sources, then hit the + button. Add New Website box will pop up. It says "Enter URL for a new website", but don't do that. Hit the drop-down arrow and select the line for racedepartment.com (4th in the list, I think). All those sites that were in the drop-down list have already been figured out for CM to basically press a download button for you. As you can see in my screenshot I have added 3 websites. Do this each time if you want to add more than one site.
Now up top you'll see that Manage Sources is still highlighted. Make sure there is a check in the first checkbox about "Download files". I think it does by default, but just make sure all three are like that. You select the website you are "managing" on the left-side list of sites. Now go to the same horizontal line as Manage Sources but select the Assetto Corsa Mods | Race Department which should be somewhere to the right of "Manage Sources". The Race Department Website should pop up now. That's CM's web browser. Go ahead and sign in to your account. I don't know if you NEED to do that, but I had a problem that went away sometime after I logged into my account yesterday.
Now you should be looking at the list of mods/skins/etc for Assetto Corsa on RD. Click a car or track you're interested in downloading (uninstall one or two the regular way if its the only way to practice this installation routine). Now, I've clicked the regular blue Download Now box, but I've also clicked the box called "Install" that's in the web browsers address bar all the way to the right. Either one of those should work and you should see a notification box pop up in the lower-right saying that CM is downloading <insert mod name>. You'll also see that the new hamburger menu has turned green.
Use the web browser in CM like you would use your default browser. Go pick another car or track to install (not skins). Follow the same procedure. Okay, let's say that's all you're interested in - those two tracks or whatever. The green hamburger button might be scrolling a down arrow which means CM is still downloading the mod to your computer. Once it's back to just a green hamburger button go ahead and press it. At the bottom of the menu now it should list the 2 mods you asked CM to download. They're still not actually installed yet, but thats good because you'll see that it might say you've got a New Track - Daytona & New Car - Chevy Pickup, or it might say that one of the mods is an "update". I'm pretty sure that just means that it currently has the same exact kn5 file installed into your AC game. Good modders will put a version number, so if you see your version is older you can remove it from the list and not overwrite anything. Well, if you're happy with both mods hit the Install button at the very bottom. Someone gave me a nice car mod pack earlier from AC Sim Dreams - it had like 14 cars in one rar file that I had to download manually because it wasn't on Race Department and I didn't know how to automate the site it was on. The list underneath the hamburger button showed me that 11 were brand new cars to me and 3 I already had installed. So, I unchecked those 3 and hit Install and it installed all 11 cars in 2 seconds.
That's it.
The only real difference that Mod Shop makes, as far as I can currently tell, compared to downloading the two mods to your HDD and then drag&drop them into CM - you get the same list asking if you want to upgrade or install as a final check...there is no cleanup afterwards. Last week you would now have to decide if you want to hold onto those 2 mod archives and if so, put 'em somewhere...or if you don't want to keep them you have to manually delete them. That's about all that I can currently see as being the difference. I'm sure I'm wrong and I just don't know it yet. There's gotta be a reason x4fab went thru all of this trouble, ya know?
Go into the ABOUT section of Content Manager and look over the last couple of Release Notes and especially "Clicking Download Buttons Automatically" in the Important Tips section right next to Release Notes. You'll see that there is something else going on with this Mod Shop - frankly, I'm already impressed. It's saved me quite a bit of time already.
SKINS:
Ugh. The same deal applies with Skins. You can't go to Race Department and throw two BMW M4 skin packs, a new Lambo GT3 skin, Abarth 500 Esse Esse skin and a Ferrari 458 GT2 skin into your download queue and hit INSTALL the way you can with cars and tracks. If you do, those skins are going to end up in the wrong car's Skins folder.
If you want to install two new skins for your Corvette C7R, you better make sure your Corvette C7R is you're "selected" car in Quick Drive mode AND Content > Cars. Once you select the Vette in Quick Drive mode, just hover the mouse over the preview pic of the Vette and that small round circle appears to get you into Content > Cars as fast as possible. Now you can install your two new skins for the Vette.
I hope I've helped in some way.