I have my own way which is long, but doesn't result in double-entries in the buy menu.
First, open Base.rte/Index.ini in in there,
Code:
Index your chosen mod's ini's. Like
[code]DataModule:
*Normal Stuff*
[TAB] IncludeFile "Mymod.rte/Devices.ini"
ETC
then
IncludeFile "Base.rte/activities.ini".
[/code]
DO NOT TRY TO INDEX A MOD'S INDEX.
Then, once that's done, go to the chosen mod(s) and Comment Out the lines in the index.ini, so it looks like
Code:
DataModul
// IncludeFile "..."
...
and so on.