No problem! IIRC, you just need the pan gasket and the filter which are both typically included in a "kit" from AutoZone and similar merchants. Otherwise you'll need to order the gasket separately. A thin film of Permatex applied to the pan mating surface will help keep the gasket in place. If you've never seen an automatic transmission filter they're kinda funky looking and some have an o-ring or retention clip. I don't recall seeing anything like this on Isuzu transmissions, but that doesn't mean it won't be there.

Do you have the CD service manual?