I'm not sure what .asp page or line to do this is located.
I want to make it so when the root folder is opened without a specified .asp page and is directed to default.asp it will pull the group=# I tell it to. I want to make default.asp automatically go to default.asp?Group=5 so if someone changes the group in the dropdown and then clicks "all forums" from that group it will go to default.asp?Group=5. I know I can change it individually in topic,search,etc.. but I want to change it from the master default setting so I dont have to hardcode each individual page.
When a user first accesses the forum, it loads the forums and categories from the "Default Categories" group. So whatever categories you want to be displayed by default, when they first access your forum, put those categories in the "Default Categories" group.
You can administer the groups by going to Admin Options, Group Categories Configuration.
If this is not what you're asking, please elaborate further.