Patch: Custom Items

1. Tested antidote and now I can use it on all characters that aren't even poisoned.  In vanilla, the screen will shake a bit and not allow it.

It is correct. The check of the character status was abolished in items usage. Otherwise, you could only use antidote if the character has the poison status. Even if you change the item data of antidote to heal HP/MP or cure other status, it will refuse to be used in the default game unless the character has the poison status.

Without the check, antidote can be redesigned to be used for another purpose instead of to cure poison only.

2.  Sleeping bag doesn't revive my person from wounded.  It shows their health full but still stays grey and wounded.

Sleeping Bag has hard coded features. It is somehow linked with the tent usage with save points. If you can edit another common item, like antidote, with your new sleeping bag data and it works as intended, the hard coded settings for the sleeping bag item slot must be interfering. You will need to do assembler modifications to fix that or use another item without hard coded settings.

* Another problem I noticed so far is that my skeans aren't showing up properly in the Vargas battle.  No animation is played but it certainly does damage.  Haven't tested on other bosses yet.

The Vargas battle is a special battle. While the bodyguards/bears are active, he can't be targeted. Perhaps, it is the issue.

You can try to put inside the Vargas script a opcode to make it target-able. Check the FB opcode for the monster scripts here.