With 4312 you can write MIMS Connector scripts.
These are different to Mint in that they don't run from within Mims. Instead you write them using Excel or Project macros or VB applications. You can access Connector in almost all modern PC development environments.
You can run Mint scripts in MIMS Explorer, but only on MSO screens. Just go to tools/options/scripts while on an MSO and you will see the same Mint options as in Smartgui.
You can use Smartgui, but its best avoided really as it is unsupported in Win2000 and so is nearly obselete.